Road construction building material transfer crane

Abstract

The invention relates to the technical field of hoisting equipment, in particular to a road construction building material transfer crane which comprises movable frames, a main beam is fixedly arranged on the upper surfaces of the movable frames, an electric hoist is fixedly installed on the main beam, a lifting hook is connected to the traction end of the electric hoist, and a placing plate is movably arranged between the movable frames. A fixing frame is fixedly arranged on the upper surface of the placing plate, an abutting plate is movably arranged in the fixing frame, a first spring is fixedly connected to the upper surface of the abutting plate, the end of the first spring is connected with the inner wall of the top of the fixing frame, and a mounting hole is formed in the lower surface of the placing plate. The building materials can be automatically locked in the lifting process, the transfer efficiency is greatly improved, meanwhile, the downward pressure applied to the building materials by an abutting plate is in direct proportion to the weight of the building materials, the heavier the building materials are, the larger the downward pressure applied to the building materials by the abutting plate is, the stability of the building materials in the moving process of the crane can be guaranteed, and the safety of the crane is guaranteed. And the use effect is better.

Description

Technical Field

[0001] The invention relates to the technical field of lifting equipment, and in particular to a building material transfer crane for road construction. Background Art

[0002] In road construction projects, the transfer of building materials is an important and frequent task. Common building materials include but are not limited to precast cement slabs, large pipes, etc. These building materials have the characteristics of heavy weight, large volume, etc.

[0003] At present, the general-purpose cranes commonly used in the construction industry have certain shortcomings in road construction scenarios. During use, the building materials usually need to be fixed first to ensure the stability of the building materials during transportation. After the building materials are transferred to the target location, they need to be released before they can be moved, taken, and other operations. The process is very cumbersome and greatly affects the transportation efficiency of building materials. Therefore, it is urgent to design a road construction building materials transfer crane to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the defects in the prior art and to propose a road construction building material transfer crane.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A road construction building material transfer crane comprises a mobile frame, a main beam is fixedly arranged on the upper surface of the mobile frame, an electric hoist is fixedly installed on the main beam, a hook is connected to the traction end of the electric hoist, a placement plate is movably arranged between the mobile frames, a fixed frame is fixedly arranged on the upper surface of the placement plate, and a holding plate is movably arranged on the fixed frame, a first spring is fixedly connected to the upper surface of the holding plate, and the end of the first spring is connected to the top inner wall of the fixed frame, a mounting hole is opened on the lower surface of the placement plate, and a rope guide tube is fixedly arranged in the mounting hole, the rope guide tube is in a U-shape, and the guide A traction rope is movably arranged in the rope tube, a lower connecting plate is arranged above the placing plate, and a fixing rod is fixedly arranged on the upper surface of the lower connecting plate, an upper connecting plate is fixedly arranged on the top of the fixing rod, a lower fixing plate is movably arranged between the upper connecting plate and the lower connecting plate, a connecting rod is fixedly arranged on the upper surface of the lower fixing plate, and the connecting rod passes through the upper connecting plate, an upper fixing plate is fixedly arranged on the top of the connecting rod, and a lifting ring is fixedly arranged on the upper surface of the upper fixing plate, the lifting hook and the lifting ring are hung, a pressure sensor is also fixedly arranged on the upper surface of the lower fixing plate, and the pressure sensor is located between the upper connecting plate and the lower fixing plate, and also includes: A connecting assembly, which is arranged at both ends of the traction rope and is used to connect the two ends of the traction rope to the supporting plate and the lower connecting plate respectively; The stabilization component is arranged on one side of the mobile frame and is used to maintain the stability of the placement board after the placement board is lifted.

[0006] As a further solution of the present invention: the connecting component includes a connecting block fixedly arranged on the upper surface of the supporting plate and the lower connecting plate, the outer wall of the connecting block is provided with a through hole, and the end of the traction rope passes through the through hole, the outer wall of the connecting block is also provided with locking holes distributed in a rectangular array, and the traction rope passes through the locking holes, and a guiding component is also arranged under the placement plate to assist the traction rope to move in the rope guide tube.

[0007] As a further solution of the present invention: the drainage component includes a bracket fixedly arranged on the lower surface of the placement plate, and a rotating shaft is rotatably arranged in the bracket, a prong is fixedly arranged on the outer wall of the rotating shaft, an installation opening is opened on the inner side of the guide rope tube, and the prong is located in the installation opening, and a crank is fixedly arranged on the end of the rotating shaft.

[0008] As a further solution of the present invention: a rubber pad is fixedly provided on the lower surface of the supporting plate, and support pads distributed equidistantly are fixedly provided on the upper surface of the placing plate. A supporting assembly is also provided above the placing plate for supporting the building materials to be transferred.

[0009] As a further solution of the present invention: the material support assembly includes a support plate, the support plate and the support pad are staggered, the upper surface of the support plate is fixedly provided with rollers distributed at equal distances, the lower surface of the support plate is fixedly provided with a telescopic rod, and the telescopic rod passes through the placement plate, the bottom end of the telescopic rod is fixedly provided with a baffle, the outer side of the telescopic rod is sleeved with a second spring, the top end of the second spring is connected to the lower surface of the placement plate, and the other end of the second spring is connected to the upper surface of the baffle.

[0010] As a further solution of the present invention: the stabilization maintenance component includes a side panel fixedly arranged on the outer wall of one side of the mobile frame, and a positioning block is fixedly arranged on the lower surface of the side panel, the positioning block is conical, and the outer wall of the placement plate is provided with a positioning opening that matches the positioning block.

[0011] As a further solution of the present invention: the outer wall of the movable frame is also provided with movable openings distributed at equal distances, and a supporting member is movably arranged in the movable opening, a limiting plate is fixedly arranged on the lower surface of the supporting member, and a push-pull plate is fixedly arranged on the end of the supporting member.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a road construction building material transfer crane. The supporting plate can be maintained in a position close to the upper part of the fixed frame under the pulling force of the first spring. The building materials to be transferred can be placed on the placing plate, and then the lifting hook can be pulled upward by the electric hoist. Since the lifting hook is hung on the lifting ring, the lifting ring moves up with the lifting hook, and then drives the upper fixing plate to move up together. The upper fixing plate drives the lower fixing plate to move up through the connecting rod, and the lower fixing plate drives the upper connecting plate to move up. The upper connecting plate drives the lower connecting plate to move up through the fixing rod. Since the two ends of the traction rope are respectively connected to the supporting plate and the lower connecting plate, the lower connecting plate will drive the traction rope to move in the rope guide tube at this time, and pull the supporting plate downward, so that the supporting plate moves downward and the first spring is stretched until the supporting plate fits with the upper surface of the building materials to be transferred. As the hook moves further upward, the guide rope tube under the placement plate will leave the ground, so that the placement plate and the building materials are lifted together, and the building materials can be automatically locked during the lifting process, which has a better use effect. At the same time, the downward pressure exerted by the supporting plate on the building materials is proportional to the weight of the building materials themselves. The heavier the building materials, the greater the downward pressure exerted by the supporting plate on the building materials, so as to ensure the stability of the building materials during the movement of the crane. When the hook replaces the placement plate on the ground, the elastic force of the first spring can automatically release the lock of the supporting plate on the building materials. It is very convenient to use and can greatly improve the efficiency of building material transfer. Furthermore, after the building materials are lifted, the stabilizing component can be used to maintain the stability of the placement plate to avoid the placement plate shaking back and forth during the movement of the crane, which has a better use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the structure of a road construction material transfer crane from a first perspective provided by an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a road construction material transfer crane from a second perspective provided by an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a placement plate in a road construction material transfer crane provided by an embodiment of the present invention from a first perspective; Figure 4 A schematic diagram of the structure of a placing plate in a road construction material transfer crane from a second perspective provided by an embodiment of the present invention; Figure 5 A third-view structural schematic diagram of a placement plate in a road construction building material transfer crane provided by an embodiment of the present invention; Figure 6 A schematic diagram of the structure of a traction rope in a road construction building material transfer crane provided by an embodiment of the present invention; Figure 7 A schematic diagram of the structure of a connecting block in a road construction building material transfer crane provided by an embodiment of the present invention; Figure 8A third-perspective structural schematic diagram of a road construction building material transfer crane provided in an embodiment of the present invention.

[0014] In the figure: 101-mobile frame, 102-main beam, 103-electric hoist, 104-hook, 105-placing plate, 106-fixed frame, 107-first spring, 108-holding plate, 109-rope guide tube, 110-traction rope, 111-lower connecting plate, 112-fixed rod, 113-upper connecting plate, 114-upper fixed plate, 115-connecting rod, 116-lower fixed plate, 117-pressure sensor, 118-lifting ring, 201 -connecting block, 202-through hole, 203-locking hole, 204-bracket, 205-rotating shaft, 206-rabbet, 207-crank handle, 301-rubber pad, 302-support pad, 303-support plate, 304-roller, 305-telescopic rod, 306-blocking plate, 307-second spring, 401-side plate, 402-positioning block, 403-positioning port, 501-supporting member, 502-push-pull plate, 503-limiting plate. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] like Figure 1-Figure 8As shown, a road construction building material transfer crane provided by an embodiment of the present invention includes a mobile frame 101, a main beam 102 is fixedly provided on the upper surface of the mobile frame 101, and an electric hoist 103 is fixedly installed on the main beam 102, and a hook 104 is connected to the traction end of the electric hoist 103, a placing plate 105 is movably provided between the mobile frames 101, a fixed frame 106 is fixedly provided on the upper surface of the placing plate 105, and a supporting plate 108 is movably provided in the fixed frame 106, a first spring 107 is fixedly connected to the upper surface of the supporting plate 108, and the end of the first spring 107 is connected to the top inner wall of the fixed frame 106, a mounting hole is opened on the lower surface of the placing plate 105, and a rope guide tube 109 is fixedly provided in the mounting hole, the rope guide tube 109 is U-shaped, and a traction rope 110 is movably provided in the rope guide tube 109, a lower connecting plate 111 is provided above the placing plate 105, and the upper surface of the lower connecting plate 111 is fixed A fixing rod 112 is provided, an upper connecting plate 113 is fixedly provided at the top of the fixing rod 112, a lower fixing plate 116 is movably provided between the upper connecting plate 113 and the lower connecting plate 111, a connecting rod 115 is fixedly provided on the upper surface of the lower fixing plate 116, and the connecting rod 115 passes through the upper connecting plate 113, an upper fixing plate 114 is fixedly provided at the top of the connecting rod 115, and a lifting ring 118 is fixedly provided on the upper surface of the upper fixing plate 114, the lifting hook 104 and the lifting ring 118 are hung, and the lower fixing plate 116 is fixedly provided with a connecting rod 115 on the upper surface of the upper fixing plate 114. A pressure sensor 117 is also fixedly installed on the upper surface of the fixing plate 116, and the pressure sensor 117 is located between the upper connecting plate 113 and the lower fixing plate 116. It also includes: a connecting component, which is arranged at both ends of the traction rope 110, and is used to connect the two ends of the traction rope 110 to the supporting plate 108 and the lower connecting plate 111 respectively; a stabilizing component, which is arranged on one side of the mobile frame 101, and is used to maintain the stability of the placement plate 105 after the placement plate 105 is lifted.

[0017] The holding plate 108 can be maintained at a position near the top of the fixing frame 106 under the pulling force of the first spring 107. The building materials to be transferred can be placed on the placing plate 105, and then the hook 104 can be pulled upward by the electric hoist 103. Since the hook 104 is hung on the ring 118, the ring 118 moves upward with the hook 104, thereby driving the upper fixing plate 114 to move upward together. The upper fixing plate 114 drives the lower fixing plate 114 through the connecting rod 115. 16 moves up, the lower fixing plate 116 drives the upper connecting plate 113 to move up, and the upper connecting plate 113 drives the lower connecting plate 111 to move up through the fixing rod 112. Since the two ends of the traction rope 110 are respectively connected to the abutting plate 108 and the lower connecting plate 111, the lower connecting plate 111 will drive the traction rope 110 to move in the rope guide tube 109 and pull the abutting plate 108 downward, so that the abutting plate 108 moves down and the first spring 107 is stretched until the abutting plate 108 is in contact with the waiting plate 108. The upper surface of the transferred building material is in contact with each other. At this time, as the hook 104 moves further upward, the guide rope tube 109 under the placement plate 105 will leave the ground, so that the placement plate 105 and the building material are lifted together, and the building material can be automatically locked during the lifting process, which has a better use effect. At the same time, the downward pressure exerted by the supporting plate 108 on the building material is proportional to the weight of the building material itself. The heavier the building material, the greater the downward pressure exerted by the supporting plate 108 on the building material, so as to ensure the stability of the building material during the movement of the crane. When the hook 104 replaces the placement plate 105 on the ground, the elastic force of the first spring 107 can automatically release the lock of the supporting plate 108 on the building material. It is very convenient to use and can greatly improve the efficiency of building material transfer. Furthermore, after the building material is lifted, the stabilizing component can be used to maintain the stability of the placement plate 105 to avoid the placement plate 105 shaking back and forth during the movement of the crane, which has a better use effect.

[0018] As an embodiment of the present invention, please refer to Figure 6 and Figure 7The connection assembly includes a connection block 201 fixedly arranged on the upper surface of the supporting plate 108 and the lower connecting plate 111. The outer wall of the connection block 201 is provided with a through hole 202, and the end of the traction rope 110 passes through the through hole 202. The outer wall of the connection block 201 is also provided with locking holes 203 distributed in a rectangular array, and the traction rope 110 passes through the locking holes 203. A drainage assembly is also arranged below the placement plate 105 to assist the traction rope 110 to move in the guide rope tube 109. The traction rope 110 passes through the guide rope tube 109 under the drainage action of the drainage assembly. 09, the end of the traction rope 110 can be passed through the through hole 202 on the connecting block 201, and then repeatedly passed through the locking hole 203 in the connecting block 201, and finally the end of the traction rope 110 can be knotted, so that the traction rope 110 can be connected to the connecting block 201, and the stability of the traction rope 110 after being tied can be ensured under the action of the friction force between the traction rope 110 and the locking hole 203. When the traction rope 110 is worn, it can be directly pulled out from the locking hole 203 to facilitate the replacement of the traction rope 110, which is very convenient to use.

[0019] As an embodiment of the present invention, please refer to Figure 6 The drainage component includes a bracket 204 fixedly arranged on the lower surface of the placement plate 105, and a rotating shaft 205 is rotatably arranged in the bracket 204, a thorn wheel 206 is fixedly arranged on the outer wall of the rotating shaft 205, an installation opening is opened on the inner side of the guide rope tube 109, and the thorn wheel 206 is located in the installation opening, and a crank handle 207 is fixedly arranged on the end of the rotating shaft 205. During the installation of the traction rope 110, one end of the traction rope 110 can be first sent into the guide rope tube 109, and then the thorn wheel 206 can be driven to rotate by the crank handle 207, so that the thorn wheel 206 drives the traction rope 110 to move in the guide rope tube 109, so that the traction rope 110 can quickly pass through the guide rope tube 109, which is more convenient to use.

[0020] As an embodiment of the present invention, please refer to Figure 3 , Figure 4 and Figure 5 A rubber pad 301 is fixedly provided on the lower surface of the supporting plate 108, and support pads 302 distributed at equal distances are fixedly provided on the upper surface of the placing plate 105. A material supporting assembly is also provided above the placing plate 105 for supporting the building materials to be transferred. The building materials to be transferred can be placed on the support pad 302. When the supporting plate 108 moves downward, the rubber pad 301 will resist the upper surface of the building materials. With the help of the support pad 302 and the friction between the rubber pad 301 and the building materials, the clamping can be made more stable.

[0021] As an embodiment of the present invention, please refer to Figure 3 , Figure 4 and Figure 5The support assembly includes a support plate 303, the support plate 303 and the support pad 302 are staggered, the upper surface of the support plate 303 is fixedly provided with rollers 304 distributed at equal distances, the lower surface of the support plate 303 is fixedly provided with a telescopic rod 305, and the telescopic rod 305 passes through the placement plate 105, and the bottom end of the telescopic rod 305 is fixedly provided with a baffle 306, and the outer side of the telescopic rod 305 is sleeved with a second spring 307, the top end of the second spring 307 is connected to the lower surface of the placement plate 105, and the other end of the second spring 307 is connected to the upper surface of the baffle 306. The surfaces are connected, and during the process of placing building materials, the building materials can be placed above the support plate 303, and with the assistance of the roller 304, the process of moving the building materials can be made easier, and the building materials can be quickly and conveniently moved to the middle position above the placement plate 105. When the building materials are lifted, the downward pressure exerted by the supporting plate 108 on the building materials will prompt the support plate 303 to move downward, so that the second spring 307 on the outer side of the telescopic rod 305 is stretched until the bottom of the building materials contacts the support pad 302, which will not affect the stability of the building materials after being lifted, and the use effect is better.

[0022] As an embodiment of the present invention, please refer to Figure 5 and Figure 8 The stabilization component includes a side plate 401 fixedly arranged on the outer wall of one side of the mobile frame 101, and a positioning block 402 is fixedly arranged on the lower surface of the side plate 401, and the positioning block 402 is conical. The outer wall of the placement plate 105 is provided with a positioning hole 403 that matches the positioning block 402. When the placement plate 105 is lifted together with the building materials, the positioning block 402 under the side plate 401 will enter the positioning hole 403 on the placement plate 105, which can play a role in limiting the position of the placement plate 105, avoiding the placement plate 105 from shaking during the movement of the crane, making the transfer process of building materials more stable and the use effect better.

[0023] As an embodiment of the present invention, please refer to Figure 1 The outer wall of the mobile frame 101 is also provided with movable openings distributed at equal distances, and a supporting member 501 is movably arranged in the movable opening. A limit plate 503 is fixedly arranged on the lower surface of the supporting member 501 to prevent the supporting member 501 from falling. A push-pull plate 502 is fixedly arranged at the end of the supporting member 501. After the building materials are transported and need to be transferred from a low position to a high position, the corresponding supporting member 501 can be directly pushed to the bottom of the placement plate 105 with the help of the push-pull plate 502. When the hook 104 moves down, the placement plate 105 will be lifted by the supporting member 501, so that the lock of the building materials can be released at a high position, and then the building materials can be directly pushed to the high position. There is no need to first place the building materials on the ground to unlock them and then move them to a high position, which greatly improves the transportation efficiency of the building materials and has a better use effect.

[0024] When in use, the holding plate 108 can be maintained at a position close to the upper part of the fixing frame 106 under the pulling force of the first spring 107, and the building materials to be transferred can be placed on the placing plate 105, and then the hook 104 can be pulled upward by the electric hoist 103. Since the hook 104 is hung on the ring 118, the ring 118 moves upward with the hook 104, thereby driving the upper fixing plate 114 to move upward together, and the upper fixing plate 114 drives the lower fixing plate 114 to move upward through the connecting rod 115. The fixing plate 116 moves upward, and the lower fixing plate 116 drives the upper connecting plate 113 to move upward. The upper connecting plate 113 drives the lower connecting plate 111 to move upward through the fixing rod 112. Since the two ends of the traction rope 110 are respectively connected to the abutting plate 108 and the lower connecting plate 111, the lower connecting plate 111 drives the traction rope 110 to move in the rope guide tube 109 and pulls the abutting plate 108 downward, so that the abutting plate 108 moves downward and the first spring 107 is stretched until the abutting plate 108 The lifting hook 104 further moves upward, and the guide rope tube 109 under the placing plate 105 will leave the ground, so that the placing plate 105 and the building materials are lifted together, and the building materials can be automatically locked during the lifting process, which has a better use effect. At the same time, the downward pressure exerted by the supporting plate 108 on the building materials is proportional to the weight of the building materials themselves. The heavier the building materials, the greater the downward pressure exerted by the supporting plate 108 on the building materials, so as to ensure the stability of the building materials during the movement of the crane. When the lifting hook 104 replaces the placing plate 105 on the ground, the elastic force of the first spring 107 can automatically release the locking of the supporting plate 108 on the building materials, which is very convenient to use and can greatly improve the efficiency of building material transfer. Furthermore, after the building materials are lifted, the stabilizing component can be used to maintain the stability of the placing plate 105 to avoid the placing plate 105 shaking back and forth during the movement of the crane, which has a better use effect.

[0025] It should be particularly noted that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A road construction building material transfer crane, comprising a mobile frame, characterized in that: A main beam is fixedly arranged on the upper surface of the mobile frame, and an electric hoist is fixedly installed on the main beam, a hook is connected to the traction end of the electric hoist, a placement plate is movably arranged between the mobile frames, a fixed frame is fixedly arranged on the upper surface of the placement plate, and a holding plate is movably arranged on the fixed frame, a first spring is fixedly connected to the upper surface of the holding plate, and the end of the first spring is connected to the top inner wall of the fixed frame, a mounting hole is opened on the lower surface of the placement plate, and a rope guide tube is fixedly arranged in the mounting hole, the rope guide tube is in a U-shape, and a traction spring is movably arranged in the rope guide tube Rope, a lower connecting plate is arranged above the placing plate, and a fixing rod is fixedly arranged on the upper surface of the lower connecting plate, an upper connecting plate is fixedly arranged on the top of the fixing rod, a lower fixing plate is movably arranged between the upper connecting plate and the lower connecting plate, a connecting rod is fixedly arranged on the upper surface of the lower fixing plate, and the connecting rod passes through the upper connecting plate, an upper fixing plate is fixedly arranged on the top of the connecting rod, and a lifting ring is fixedly arranged on the upper surface of the upper fixing plate, the lifting hook and the lifting ring are hung, a pressure sensor is also fixedly arranged on the upper surface of the lower fixing plate, and the pressure sensor is located between the upper connecting plate and the lower fixing plate, and also includes: A connecting assembly, which is arranged at both ends of the traction rope and is used to connect the two ends of the traction rope to the supporting plate and the lower connecting plate respectively; The stabilization component is arranged on one side of the mobile frame and is used to maintain the stability of the placement board after the placement board is lifted.

2. A road construction building material transfer crane according to claim 1, characterized in that: The connecting assembly includes a connecting block fixedly arranged on the upper surface of the supporting plate and the lower connecting plate, the outer wall of the connecting block is provided with a through hole, and the end of the traction rope passes through the through hole, the outer wall of the connecting block is also provided with locking holes distributed in a rectangular array, and the traction rope passes through the locking holes, and a guiding assembly is also arranged under the placement plate to assist the traction rope to move in the rope guide tube.

3. A road construction building material transfer crane according to claim 2, characterized in that: The drainage component includes a bracket fixedly arranged on the lower surface of the placement plate, and a rotating shaft is rotatably arranged in the bracket, a prong is fixedly arranged on the outer wall of the rotating shaft, an installation opening is opened on the inner side of the guide rope tube, and the prong is located in the installation opening, and a crank is fixedly arranged on the end of the rotating shaft.

4. A road construction building material transfer crane according to claim 1, characterized in that: A rubber pad is fixedly provided on the lower surface of the abutting plate, and support pads distributed at equal distances are fixedly provided on the upper surface of the placing plate. A supporting assembly is also provided above the placing plate for supporting the building materials to be transferred.

5. A road construction building material transfer crane according to claim 4, characterized in that: The material support assembly includes a support plate, which is staggered between the support plate and the support pad, and rollers distributed at equal distances are fixedly provided on the upper surface of the support plate, and a telescopic rod is fixedly provided on the lower surface of the support plate, and the telescopic rod passes through the placement plate, and a baffle is fixedly provided on the bottom end of the telescopic rod, and a second spring is sleeved on the outer side of the telescopic rod, the top end of the second spring is connected to the lower surface of the placement plate, and the other end of the second spring is connected to the upper surface of the baffle.

6. A road construction building material transfer crane according to claim 1, characterized in that: The stabilization component includes a side plate fixedly arranged on the outer wall of one side of the mobile frame, and a positioning block is fixedly arranged on the lower surface of the side plate. The positioning block is conical, and the outer wall of the placement plate is provided with a positioning opening that matches the positioning block.

7. A road construction building material transfer crane according to claim 6, characterized in that: The outer wall of the movable frame is also provided with movable openings distributed at equal distances, and a supporting member is movably arranged in the movable opening, a limiting piece is fixedly arranged on the lower surface of the supporting member, and a push-pull plate is fixedly arranged on the end of the supporting member.

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