Carton sealing device for corrugated carton production

Abstract

The utility model relates to the technical field of corrugated carton production, in particular to a carton sealing device for corrugated carton production, which comprises a base, the top of the left side of the base is fixedly connected with the bottom of a conveying mechanism, and a rotating handle is rotated to drive a rotating rod to rotate. The outer wall, close to one end, of the movable threaded rod is in transmission connection with the outer wall of the top end of one lifting threaded rod through a bevel gear, the rotating rod rotates to drive the lifting threaded rod to rotate through the bevel gear, and the rotating lifting threaded rod drives the lifting threaded block to move upwards through the thread effect. A lifting threaded block moves upwards to drive a fixed top plate to move upwards, the fixed top plate moving upwards drives a movable threaded block to move upwards through a movable threaded rod, the movable threaded block moves upwards to drive a bending rod to move upwards through a connecting sliding pipe, and corrugated carton bodies with different heights can be bent through upward movement of the bending rod. The box sealing mold is prevented from being changed, and production time is greatly saved.

Description

Technical Field

[0001] The utility model relates to the technical field of corrugated paper box production, in particular to a box sealing device for corrugated paper box production. Background Art

[0002] Corrugated boxes, for more than half a century, have gradually replaced wooden boxes and other transport packaging containers with their superior performance and good processing performance, becoming the main force of transport packaging. In addition to protecting goods and facilitating warehousing and transportation, they also play a role in beautifying and promoting goods. Corrugated boxes are green and environmentally friendly products. They are beneficial to the environment and easy to load and unload. Corrugated boxes need to be sealed during the production process.

[0003] At present, most of the wind direction devices for corrugated boxes on the market are installed in a relatively fixed manner. When facing corrugated boxes of different specifications, the sealing mold needs to be replaced and changed. However, changing the sealing mold is not only cumbersome, but also wastes a lot of production time. Utility Model Content

[0004] The purpose of the present utility model is to provide a sealing device for producing corrugated cardboard boxes, so as to solve the problem proposed in the above background technology that when facing corrugated cardboard boxes of different specifications, it is necessary to replace the sealing mold for modification, and changing the sealing mold is not only cumbersome to operate, but also wastes a lot of production time. In order to achieve the above purpose, the present utility model provides the following technical solutions: a sealing device for producing corrugated cardboard boxes, comprising a base, the top of the left side of the base is fixedly connected to the bottom of the conveying mechanism, the top of the middle part of the base is fixedly connected to the bottom of the rotating mechanism, the rotating mechanism includes two rotating fixed blocks, a rotating fixed shaft, a rotating rod and a rotating handle, the outer walls of the rotating mechanism close to the two ends are respectively connected to the outer wall of the front and the outer wall of the back of the lifting mechanism, and the lifting mechanism is composed of two lifting threaded rods, two lifting fixed blocks, two lifting threaded blocks and a movable threaded rod;

[0005] The outer wall of the middle part of the lifting mechanism is threadedly connected to the inner walls of the two bending mechanisms respectively. The two bending mechanisms each include a movable threaded block, a connecting sliding tube, a bending rod, a limit rod and a sliding rod. The outer walls of the two bending mechanisms are slidably connected to the inner wall of the fixing mechanism. The fixing mechanism consists of a fixed top plate, a fixed slide groove, a fixed mounting base and a sealing tape. The inner wall of the front side and the inner wall of the back side of the fixing mechanism are respectively rotatably connected to the outer walls at both ends of the lifting mechanism.

[0006] Preferably, the base includes four columns, a support panel and a motor base, the tops of the four columns are fixedly connected to the bottom of the support panel, and the four columns are distributed in a rectangular array about the center of the bottom of the support panel, and the top of the left side of the support panel is fixedly connected to the bottom of the motor base.

[0007] Preferably, the conveying mechanism consists of a conveying motor, two conveying rods, four conveying bases, a conveyor belt and a corrugated cardboard box body. The bottom of the conveying motor is movably engaged with the top of the motor base, and one end of the conveying motor is fixedly connected to one end of one of the conveying rods through a coupling. The outer walls at both ends of the two conveying rods are rotatably connected to the inner walls of the four conveying bases, and the outer walls in the middle of the two conveying rods are transmission-connected to the inner walls on both sides of the conveyor belt, respectively. The top of the conveyor belt is movably abutted against the bottom of the corrugated cardboard box body, and the bottoms of the four conveying bases are fixedly connected to the top of the support panel. The four conveying bases are distributed in a rectangular array about the center of the top of the support panel.

[0008] Preferably, the bottoms of the two rotating fixed blocks are fixedly connected to the top of the front and back sides of the supporting panel, and the front sides of the middle parts of the two rotating fixed blocks are respectively provided with rotating through holes, the front side of the middle part of one of the rotating fixed blocks is movably engaged with the back side of the rotating fixed shaft, and the inner wall of the rotating fixed shaft is rotatably connected to the outer wall of one end of the rotating rod, the outer wall of the rotating rod close to one end and the outer wall of the other end are rotatably connected to the inner walls of the two rotating through holes, and one end of the rotating rod is fixedly connected to one end of the rotating handle, the tops of the middle parts of the two rotating fixed blocks are respectively provided with transmission through holes, and the outer walls of the rotating rod close to both ends are respectively provided with bevel gears.

[0009] Preferably, the outer walls of the bottom ends of the two lifting threaded rods are provided with bevel gears, and the outer walls of the bottom ends of the two lifting threaded rods are respectively transmission connected to the outer walls of the rotating rods near both ends, the tops of the middle parts of the two lifting fixed blocks are provided with fixed through holes, and the inner walls of the two fixed through holes are respectively rotationally connected to the outer walls of the bottom ends of the two lifting threaded rods, the tops of the middle parts of the two lifting threaded blocks are respectively provided with threaded through holes, and the inner walls of the two threaded through holes are respectively threadedly connected to the outer walls of the tops of the two lifting threaded rods, the outer wall of the top end of one of the lifting threaded rods is provided with a bevel gear, and the outer wall of the moving threaded rod near one end is provided with a bevel gear, and the outer wall of the moving threaded rod near one end is transmission connected to the outer wall of the top end of one of the lifting threaded rods through a bevel gear.

[0010] Preferably, the inner walls of the two movable thread blocks are threadedly connected to the outer wall of the middle part of the movable thread rod, and the bottom of the movable thread block is fixedly connected to the top of the connecting sliding tube, the bottom of the connecting sliding tube is fixedly connected to the top of one end of the bending rod, and the top of the middle part of the bending rod is fixedly connected to the bottom of the limiting rod, and the top of the limiting rod is fixedly connected to the bottom of the sliding rod.

[0011] Preferably, the front and back sides of the middle part of the fixed top plate are respectively provided with connecting through holes, and the inner walls of the two connecting through holes are respectively rotatably connected to the outer walls at both ends of the movable threaded rod, the top of the fixed top plate near the left side is provided with a fixed slide groove, and the inner walls of the fixed slide groove are respectively slidably connected to the outer walls of the two limit rods, the bottom of the fixed top plate near the right side is fixedly connected to the top of the fixed mounting base, and the bottom of the fixed mounting base is flipped connected to the top of the sealing tape, and the bottom of the front and back sides of the fixed top plate are respectively movably engaged with the tops of the two lifting threaded blocks.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The cam is rotated to move the upper and lower ends of the cam, and the cam is rotated to move the upper and lower ends of the cam, so that the cam can move upwards and downwards, thereby preventing the cam from sliding downwards and moving the cam upwards.

[0014] In the utility model, the lifting threaded rod rotates through the bevel gear to drive the moving threaded rod to rotate, and the rotating moving threaded rod drives the moving threaded block to move linearly through the action of the thread and the limiting action of the fixed slide groove. The linear movement of the moving threaded block drives the bending rod to move linearly through the sliding rod, which can be used to bend and seal the top of the corrugated cardboard box body of different widths. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the utility model;

[0016] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 3 It is an exploded view of the utility model;

[0018] Figure 4 It is a cross-sectional view of the rotating mechanism in the present utility model;

[0019] Figure 5 It is an exploded view of the lifting mechanism and bending mechanism in the utility model.

[0020] In the figure: 1. base; 101. column; 102. support panel; 103. motor base; 2. conveying mechanism; 201. conveying motor; 202. conveying rod; 203. conveying base; 204. conveyor belt; 205. corrugated cardboard box body; 3. rotating mechanism; 301. rotating fixed block; 302. rotating fixed axis; 303. rotating rod; 304. rotating handle; 4. lifting mechanism; 401. lifting threaded rod; 402. lifting fixed block; 403. lifting threaded block; 404. moving threaded rod; 5. bending mechanism; 501. moving threaded block; 502. connecting sliding tube; 503. bending rod; 504. limiting rod; 505. sliding rod; 6. fixing mechanism; 601. fixed top plate; 602. fixed slide; 603. fixed mounting base; 604. sealing tape. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0022] See also Figures 1 to 5 The utility model provides a technical solution: a sealing device for corrugated cardboard box production, comprising a base 1, the top of the left side of the base 1 is fixedly connected to the bottom of the conveying mechanism 2, the top of the middle part of the base 1 is fixedly connected to the bottom of the rotating mechanism 3, the rotating mechanism 3 includes two rotating fixed blocks 301, a rotating fixed shaft 302, a rotating rod 303 and a rotating handle 304, the outer walls of the rotating mechanism 3 near both ends are respectively connected to the outer wall of the front and the outer wall of the back of the lifting mechanism 4, the lifting mechanism 4 is composed of two lifting threaded rods 401, two lifting fixed blocks 402, two lifting threaded blocks 403 and a moving threaded rod 404;

[0023] The outer wall of the middle part of the lifting mechanism 4 is threadedly connected to the inner walls of the two bending mechanisms 5 respectively. The two bending mechanisms 5 include a movable threaded block 501, a connecting sliding tube 502, a bending rod 503, a limit rod 504 and a sliding rod 505. The outer walls of the two bending mechanisms 5 are slidingly connected to the inner wall of the fixing mechanism 6. The fixing mechanism 6 is composed of a fixed top plate 601, a fixed slide groove 602, a fixed mounting base 603 and a sealing tape 604. The inner wall of the front and the inner wall of the back of the fixing mechanism 6 are respectively rotatably connected to the outer walls at both ends of the lifting mechanism 4.

[0024] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, the base 1 includes four columns 101, a support panel 102 and a motor base 103. The tops of the four columns 101 are fixedly connected to the bottom of the support panel 102, and the four columns 101 are distributed in a rectangular array about the center of the bottom of the support panel 102. The top of the left side of the support panel 102 is fixedly connected to the bottom of the motor base 103. The columns 101 can keep the device stable during operation.

[0025] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, the conveying mechanism 2 consists of a conveying motor 201, two conveying rods 202, four conveying bases 203, a conveyor belt 204 and a corrugated cardboard box body 205. The bottom of the conveying motor 201 is movably engaged with the top of the motor base 103, and one end of the conveying motor 201 is fixedly connected to one end of one of the conveying rods 202 through a coupling. The outer walls at both ends of the two conveying rods 202 are respectively rotatably connected to the inner walls of the four conveying bases 203, and the outer walls in the middle of the two conveying rods 202 are respectively transmission-connected to the inner walls on both sides of the conveyor belt 204. The top of the conveyor belt 204 is movably abutted against the bottom of the corrugated cardboard box body 205, and the bottoms of the four conveying bases 203 are all fixedly connected to the top of the support panel 102. The four conveying bases 203 are distributed in a rectangular array about the center of the top of the support panel 102. The rotation of the conveying motor 201 drives the conveying rod 202 to rotate through the coupling, and the rotation of the conveying rod 202 drives the corrugated cardboard box body 205 to perform linear motion through the conveyor belt 204.

[0026] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, the bottoms of the two rotating fixed blocks 301 are fixedly connected to the top of the front and back sides of the supporting panel 102, and the front sides of the middle parts of the two rotating fixed blocks 301 are respectively provided with rotating through holes, the front side of the middle part of one of the rotating fixed blocks 301 is movably engaged with the back side of the rotating fixed shaft 302, and the inner wall of the rotating fixed shaft 302 is rotatably connected to the outer wall of one end of the rotating rod 303, the outer wall of the rotating rod 303 near one end and the outer wall of the other end are rotatably connected to the inner walls of the two rotating through holes, and one end of the rotating rod 303 is fixedly connected to one end of the rotating handle 304, the tops of the middle parts of the two rotating fixed blocks 301 are respectively provided with transmission through holes, and the outer walls of the rotating rod 303 near both ends are respectively provided with bevel gears, and the rotating handle 304 is rotated, and the rotating handle 304 rotates to drive the rotating rod 303 to rotate.

[0027] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, the outer walls of the bottom ends of the two lifting threaded rods 401 are provided with bevel gears, and the outer walls of the bottom ends of the two lifting threaded rods 401 are respectively transmission connected to the outer walls of the rotating rod 303 near both ends, and the top of the middle part of the two lifting fixed blocks 402 is provided with fixed through holes, and the inner walls of the two fixed through holes are respectively rotatably connected to the outer walls of the bottom ends of the two lifting threaded rods 401, and the tops of the middle parts of the two lifting threaded blocks 403 are respectively provided with threaded through holes, and the inner walls of the two threaded through holes are respectively threadedly connected to the outer walls of the tops of the two lifting threaded rods 401, and the outer wall of the top of one of the lifting threaded rods 401 is provided with a bevel gear, and the outer wall of the moving threaded rod 404 near one end is provided with a bevel gear, and the outer wall of the moving threaded rod 404 near one end is transmission connected to the outer wall of the top end of one of the lifting threaded rods 401 through the bevel gear, and the rotating rod 303 rotates to drive the lifting threaded rod 401 to rotate through the bevel gear, and the rotating lifting threaded rod 401 drives the lifting thread block 403 upward through the action of the thread.

[0028] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, the inner walls of the two movable threaded blocks 501 are threadedly connected to the outer wall of the middle part of the movable threaded rod 404, and the bottom of the movable threaded block 501 is fixedly connected to the top of the connecting sliding tube 502, the bottom of the connecting sliding tube 502 is fixedly connected to the top of one end of the bending rod 503, and the top of the middle part of the bending rod 503 is fixedly connected to the bottom of the limiting rod 504, and the top of the limiting rod 504 is fixedly connected to the bottom of the sliding rod 505.

[0029] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5As shown, the front and back of the middle part of the fixed top plate 601 are respectively provided with connecting through holes, and the inner walls of the two connecting through holes are respectively rotatably connected to the outer walls of the two ends of the movable threaded rod 404, and the top of the fixed top plate 601 near the left side is provided with a fixed slide 602, and the inner walls of the fixed slide 602 are respectively slidably connected to the outer walls of the two limit rods 504, and the bottom of the fixed top plate 601 near the right side is fixedly connected to the top of the fixed mounting base 603, and the bottom of the fixed mounting base 603 is flip-connected with the top of the sealing tape 604, and the bottom of the front and back of the fixed top plate 601 are respectively movably engaged with the top of the two lifting thread blocks 403, and the upward movement of the lifting thread block 403 drives the fixed top plate 601 to move upward, and the upward movement The fixed top plate 601 drives the moving threaded block 501 to move upward through the moving threaded rod 404, and the moving threaded block 501 moves upward and drives the bending rod 503 to move upward through the connecting sliding tube 502. The upward movement of the bending rod 503 can be used to bend and seal the top cover of the corrugated cardboard box body 205 of different heights. The lifting threaded rod 401 rotates and drives the moving threaded rod 404 to rotate through the bevel gear. The rotating moving threaded rod 404 drives the moving threaded block 501 to move linearly through the thread action and the limiting action of the fixed slide 602. The linear movement of the moving threaded block 501 drives the bending rod 503 to move linearly through the sliding rod 505, which is suitable for bending and sealing the top of the corrugated cardboard box body 205 of different widths, thereby improving the scope of use.

[0030] The use method and advantages of the utility model: When the corrugated paper box production sealing device is working, the working process is as follows:

[0031] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5As shown, by rotating the rotating handle 304, the rotating handle 304 drives the rotating rod 303 to rotate, and the outer wall of the moving threaded rod 404 near one end is connected to the outer wall of the top of one of the lifting threaded rods 401 through a bevel gear. The rotating rod 303 rotates and drives the lifting threaded rod 401 to rotate through the bevel gear. The rotating lifting threaded rod 401 drives the lifting thread block 403 to move upward through the thread action. The upward movement of the lifting thread block 403 drives the fixed top plate 601 to move upward. The upward moving fixed top plate 601 drives the moving thread block 501 to move upward through the moving threaded rod 404. The moving thread block 501 moves upward The movement drives the bending rod 503 to move upward through the connecting sliding tube 502. The upward movement of the bending rod 503 can be used for corrugated cardboard box bodies 205 of different heights, avoiding the need to change the sealing mold and saving a lot of production time. The lifting threaded rod 401 rotates and drives the moving threaded rod 404 to rotate through the bevel gear. The rotating moving threaded rod 404 drives the moving thread block 501 to move linearly through the thread action and the limiting action of the fixed slide 602. The linear movement of the moving thread block 501 drives the bending rod 503 to move linearly through the sliding rod 505, which can be used for bending and sealing the top of the corrugated cardboard box body 205 of different widths, thereby improving the scope of use.

[0032] The above shows and describes the basic principles, main features, and advantages of the present invention. Persons skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A corrugated box sealing device for producing corrugated boxes, comprising a base (1), characterized in that: The top of the left side of the base (1) is fixedly connected to the bottom of the transmission mechanism (2), and the top of the middle part of the base (1) is fixedly connected to the bottom of the rotating mechanism (3). The rotating mechanism (3) includes two rotating fixed blocks (301), a rotating fixed shaft (302), a rotating rod (303) and a rotating handle (304). The outer walls of the rotating mechanism (3) close to the two ends are respectively connected to the outer wall of the front and the outer wall of the back of the lifting mechanism (4). The lifting mechanism (4) is composed of two lifting threaded rods (401), two lifting fixed blocks (402), two lifting threaded blocks (403) and a moving threaded rod (404). The outer wall of the middle part of the lifting mechanism (4) is respectively threadedly connected to the inner walls of the two bending mechanisms (5), and the two bending mechanisms (5) each include a movable thread block (501), a connecting sliding tube (502), a bending rod (503), a limiting rod (504) and a sliding rod (505). The outer walls of the two bending mechanisms (5) are both slidably connected to the inner wall of the fixing mechanism (6), and the fixing mechanism (6) is composed of a fixed top plate (601), a fixed slide groove (602), a fixed mounting base (603) and a sealing tape (604). The inner wall of the front side and the inner wall of the back side of the fixing mechanism (6) are respectively rotatably connected to the outer walls at both ends of the lifting mechanism (4).

2. A corrugated box sealing device according to claim 1, characterized in that: The base (1) comprises four columns (101), a support panel (102) and a motor base (103); the tops of the four columns (101) are fixedly connected to the bottom of the support panel (102); the four columns (101) are distributed in a rectangular array about the center of the bottom of the support panel (102); and the top of the left side of the support panel (102) is fixedly connected to the bottom of the motor base (103).

3. A corrugated box sealing device according to claim 2, characterized in that: The conveying mechanism (2) is composed of a conveying motor (201), two conveying rods (202), four conveying bases (203), a conveyor belt (204) and a corrugated cardboard box body (205). The bottom of the conveying motor (201) is movably connected to the top of the motor base (103), and one end of the conveying motor (201) is fixedly connected to one end of one of the conveying rods (202) through a coupling. The outer walls at both ends of the two conveying rods (202) are respectively rotatably connected to the inner walls of the four conveying bases (203), and the outer walls in the middle of the two conveying rods (202) are respectively transmission-connected to the inner walls on both sides of the conveyor belt (204). The top of the conveyor belt (204) is movably abutted against the bottom of the corrugated cardboard box body (205), and the bottoms of the four conveying bases (203) are all fixedly connected to the top of the support panel (102). The four conveying bases (203) are distributed in a rectangular array with respect to the center of the top of the support panel (102).

4. A corrugated box sealing device according to claim 2, characterized in that: The bottoms of the two rotating fixed blocks (301) are fixedly connected to the top of the front and back of the supporting panel (102), and the front of the middle part of the two rotating fixed blocks (301) is respectively provided with a rotating through hole, the front of the middle part of one of the rotating fixed blocks (301) is movably engaged with the back of the rotating fixed shaft (302), and the inner wall of the rotating fixed shaft (302) is rotatably connected to the outer wall of one end of the rotating rod (303), the outer wall of the rotating rod (303) near one end and the outer wall of the other end are respectively rotatably connected to the inner walls of the two rotating through holes, and one end of the rotating rod (303) is fixedly connected to one end of the rotating handle (304), the top of the middle part of the two rotating fixed blocks (301) is respectively provided with a transmission through hole, and the outer walls of the rotating rod (303) near both ends are respectively provided with a bevel gear.

5. The corrugated box sealing device according to claim 4, characterized in that: The outer walls of the bottom ends of the two lifting threaded rods (401) are provided with bevel gears, and the outer walls of the bottom ends of the two lifting threaded rods (401) are respectively connected to the outer walls of the rotating rods (303) near both ends in a transmission manner, the tops of the middle parts of the two lifting fixed blocks (402) are provided with fixed through holes, and the inner walls of the two fixed through holes are respectively connected to the outer walls of the bottom ends of the two lifting threaded rods (401) in a rotation manner, the tops of the middle parts of the two lifting threaded blocks (403) are respectively provided with threaded through holes, and the inner walls of the two threaded through holes are respectively connected to the outer walls of the top ends of the two lifting threaded rods (401) in a threaded manner, the outer wall of the top end of one of the lifting threaded rods (401) is provided with a bevel gear, and the outer wall of the moving threaded rod (404) near one end is provided with a bevel gear, and the outer wall of the moving threaded rod (404) near one end is connected to the outer wall of the top end of one of the lifting threaded rods (401) in a transmission manner through the bevel gear.

6. The corrugated box sealing device according to claim 5, characterized in that: The inner walls of the two movable threaded blocks (501) are both threadedly connected to the outer wall of the middle part of the movable threaded rod (404), and the bottom of the movable threaded block (501) is fixedly connected to the top of the connecting sliding tube (502), the bottom of the connecting sliding tube (502) is fixedly connected to the top of one end of the bending rod (503), and the top of the middle part of the bending rod (503) is fixedly connected to the bottom of the limiting rod (504), and the top of the limiting rod (504) is fixedly connected to the bottom of the sliding rod (505).

7. A corrugated box sealing device according to claim 6, characterized in that: The front and back of the middle part of the fixed top plate (601) are respectively provided with connecting through holes, and the inner walls of the two connecting through holes are respectively rotatably connected to the outer walls of the two ends of the movable threaded rod (404), the top of the fixed top plate (601) near the left side is provided with a fixed slide groove (602), and the inner walls of the fixed slide groove (602) are respectively slidably connected to the outer walls of the two limit rods (504), the bottom of the fixed top plate (601) near the right side is fixedly connected to the top of the fixed mounting base (603), and the bottom of the fixed mounting base (603) is flip-connected to the top of the sealing tape (604), and the bottom of the front and back of the fixed top plate (601) are respectively movably connected to the top of the two lifting threaded blocks (403).

Images