Energy-saving preheating bottle machine

Abstract

The application discloses an energy-saving preheating bottle machine, and relates to the technical field of bottle packaging. The machine has the advantages that the heat emitted from the inlet of a heating cover can be utilized, and the heat waste at the inlet of the heating cover is reduced. The technical scheme is as follows: an arc-shaped channel which is in communication with a conveying device is arranged at the inlet of a heating channel of a frame body; one end of the arc-shaped channel which is away from the conveying device is provided with a conveying belt which is perpendicular to the length direction of the conveying device; arc-shaped covers and protective covers which are arranged above the arc-shaped channel and the conveying belt are arranged on the frame body respectively; and the lower end surfaces of the arc-shaped covers and the protective covers are in contact with the upper end surfaces of the arc-shaped channel and the conveying belt.

Description

Technical Field

[0001] This invention relates to the field of bottle packaging technology, specifically to an energy-saving bottle preheating machine. Background Technology

[0002] Bottle packaging typically has a sealing film covering the bottle opening. This film uses the principle of heat shrinkage to seal the bottle opening, effectively isolating it from air, preventing dust, and preventing theft.

[0003] Chinese Patent CN114229763B discloses a novel bottle preheating machine, comprising a frame, a heating channel mounted on the frame, and a conveying device for conveying and outputting bottles into and out of the heating channel. The heating channel includes two air ducts for heating the bottle openings, distributed on both sides of the bottle. A drive mechanism for moving the air ducts up and down is also provided within the heating channel. The heating channel includes a heating hood mounted on the upper part of the frame, which consists of two rows of columns mounted on the ground.

[0004] The heating cover has an inlet for the conveying device and the bottle to be moved in. The heat inside the heating cover can easily dissipate into the air from the inlet, so the heat dissipated from the inlet is not utilized and some thermal energy is wasted.

[0005] Therefore, the applicant has developed a new technical solution in the actual production process to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide an energy-saving preheating bottle machine that has the advantage of utilizing the heat emitted from the heating hood inlet and reducing heat waste at the heating hood inlet.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This invention provides an energy-saving bottle preheating machine, including a frame, a heating channel mounted on the frame, and a conveying device for conveying and outputting bottles into and out of the heating channel. The heating channel is provided with air blowing ducts for heating the bottle mouth. There are two air blowing ducts distributed on both sides of the bottle. The frame is provided with an arc-shaped channel at the inlet of the heating channel that communicates with the conveying device. The end of the arc-shaped channel away from the conveying device is provided with a conveyor belt perpendicular to the length direction of the conveying device. The frame is provided with an arc-shaped cover and a protective cover covering the arc-shaped channel and the conveyor belt, respectively. The lower end face of the arc-shaped cover and the protective cover are in contact with the upper end face of the arc-shaped channel and the conveyor belt.

[0008] By adopting the above technical solution, the arc-shaped channel allows the heat emitted from the heating channel inlet to preheat the arc-shaped channel and the bottles on the conveyor belt. The arc-shaped channel also increases the path of the hot air as it flows within the channel, ensuring that the heat at the heating channel inlet is in contact with the bottles to be preheated for a longer period of time, reducing heat waste at the heating hood inlet and saving energy. The conveyor belt changes the direction of bottle transport, and the conveyor belt and conveying device are L-shaped, reducing the floor space required. When transporting bottles into the heating hood, the bottles first pass through the protective cover on the conveyor belt and then through the arc-shaped cover of the arc-shaped channel for gradual preheating.

[0009] Preferably, the heating channel includes a heating cover mounted on the frame, with an inlet and an outlet at each end of the heating cover for the conveying device and the bottle to move out and in, respectively; The conveying device includes a conveyor belt with one end located outside the heating hood inlet and the other end passing through the heating hood and exiting the heating hood outlet. The conveyor belt conveys the bottle body in and out of the heating hood. Both ends of the conveyor belt are provided with H-shaped support frames supported on the ground. Pulleys are rotatably connected to the opposite opening walls of the upper openings of the support frames. The conveyor belt is wound around the pulleys. One of the support frames is provided with a motor that drives the pulleys to rotate. The inner wall of the cabinet is provided with baffles on both sides of the conveyor belt at the end of the conveyor belt inside the cabinet. The baffles do not extend out of the heating hood inlet.

[0010] Preferably, the protective cover above the conveyor belt is distributed along the length of the conveyor belt. The arc-shaped channel includes several pillars placed on the ground. The upper ends of each pillar are connected by a fixing plate. A circular groove is opened on the upper surface of the fixing plate. A turntable is rotatably connected to the fixing plate in the circular groove. The upper surface of the turntable is flush with the upper surface of the fixing plate. A motor for driving the turntable to rotate is provided at the bottom of the fixing plate. The upper surface of the fixing plate is flush with the upper surface of both the transmission belt and the conveyor belt. One end of the arc-shaped cover is fixed to the outer wall of the heating cover and communicates with the inlet of the heating cover. The other end is communicated with the protective cover on the conveyor belt. The longitudinal section of both the protective cover and the arc-shaped cover is inverted U-shaped.

[0011] Preferably, the protective cover on the conveyor belt has a downwardly extending closed plate at the end away from the arc-shaped cover, and the closed plate has an insertion hole for the bottle to be moved into the protective cover.

[0012] Preferably, one end of the conveyor belt extends out to a protective cover, and at the extended end there are placement plates located on both sides of the conveyor belt. The lower ends of the two placement plates are provided with several uprights extending to the ground and fixed to the ground. The length direction of each placement plate is distributed along the length direction of the conveyor belt. The placement plate is provided with a moving part for moving the bottle placed on the placement plate to the conveyor belt.

[0013] Preferably, the movable component includes horizontally distributed guide rails arranged on opposite sides of two shelf panels. The height of the guide rails is higher than the height of the shelf panels. Each guide rail has a connecting rod at both ends. The end of the connecting rod away from the guide rail is fixed to a vertical rod. A slider is slidably connected to each of the two guide rails. The slider is located on the opposite side of the two guide rails. The upper and lower ends of the two sliders extend beyond the upper and lower ends of the guide rails. The portions extending beyond the upper and lower ends of the guide rails are provided with fixing blocks that continue to extend towards the opposite sides of the two guide rails. A U-shaped guide strip is provided between the fixing blocks on the two guide rails. The two vertical sides of the guide strip are respectively connected to the fixing blocks on the two guide rails. The side between the two vertical sides is an arc-shaped side. A power component for driving the slider to move is provided on the guide rails.

[0014] Preferably, the power component includes an elongated groove formed on one side of two guide rails facing away from each other. The slider is slidably connected in the groove. A lead screw is rotatably connected to the opposite wall of one of the grooves. The lead screw passes through the slider and is threadedly connected to the slider. A second motor for driving the lead screw to rotate is provided on the guide rail.

[0015] Preferably, one end of the guide strip extends to a position connected to the fixed block, and the width of the guide strip on the side that contacts the guide rail is greater than the width of the guide rail. Both the upper and lower ends of the guide rail are provided with moving grooves distributed along the length of the guide rail. The guide strip on the side facing the guide rail is provided with a moving block that slides in the moving groove. The guide strip is made of flexible plastic, and the fixed block is connected to the moving block.

[0016] Preferably, the fixed block and the movable block are detachably connected, and a screw is threadedly connected to the upper end face of the fixed block, the screw passing through the fixed block and threadedly connected to the movable block.

[0017] Preferably, the guide bar moves at a speed less than the speed at which the conveyor belt transports the bottle.

[0018] The beneficial effects of this invention are as follows: the arc-shaped channel allows the heat emitted from the heating channel inlet to preheat the arc-shaped channel and the bottles on the conveyor belt. The arc-shaped channel also increases the path of the hot air as it flows within the channel, allowing the heat at the heating channel inlet to be in contact with the bottles to be preheated for a longer period of time, reducing heat waste at the heating hood inlet and saving energy. The conveyor belt changes the direction of bottle transport, and the conveyor belt and conveying device are L-shaped, reducing the floor space required. When transporting the bottles into the heating hood, the bottles first pass through the protective cover on the conveyor belt and then through the arc-shaped cover of the arc-shaped channel for gradual preheating. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this embodiment; Figure 2 This is a schematic diagram illustrating the structure of the arc-shaped channel in this embodiment; Figure 3 This is a schematic diagram illustrating the structure of the conveyor belt in this embodiment; Figure 4 for Figure 3 A magnified structural diagram of part A in the middle.

[0021] Explanation of reference numerals in the attached figures: In the diagram: 1. Frame; 11. Heating channel; 111. Heating cover; 112. Inlet; 113. Outlet; 12. Conveying device; 121. Conveyor belt; 122. Support frame; 13. Arc-shaped channel; 131. Arc-shaped cover; 132. Support column; 133. Fixing plate; 134. Circular groove; 135. Turntable; 136. Motor 1; 14. Conveyor belt; 141. Protective cover; 142. Enclosure plate; 143. Insertion hole; 15. Shelf; 151. Upright; 152. Guide rail; 153. Connecting rod; 154. Slider; 155. Fixing block; 156. Guide bar; 16. Slide groove; 161. Lead screw; 162. Motor 2; 163. Moving groove; 164. Moving block; 165. Screw. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] An energy-saving bottle preheating machine, such as Figure 1 and Figure 2The system includes a frame 1, a heating channel 11 mounted on the frame 1, and a conveying device 12 for conveying and outputting bottles into and out of the heating channel 11. The heating channel 11 has two air ducts for heating the bottle openings, distributed on both sides of the bottle. The structure of the air ducts can be the air duct structure disclosed in the novel bottle preheating machine in patent CN114229763B, which will not be elaborated here. The frame 1 has an arc-shaped channel at the inlet 112 of the heating channel 11 that communicates with the conveying device 12. 13. The end of the arc-shaped channel 13 away from the conveying device 12 is provided with a conveyor belt 14 perpendicular to the length direction of the conveying device 12. The frame 1 is provided with an arc-shaped cover 131 and a protective cover 141 covering the arc-shaped channel 13 and the conveyor belt 14 respectively. The lower end face of the arc-shaped cover 131 and the protective cover 141 are in contact with the upper end face of the arc-shaped channel 13 and the conveyor belt 14. The contact means that the arc-shaped cover 131 and the protective cover 141 are not affected by the transmission of the arc-shaped channel 13 and the conveyor belt 14, but only play a role in covering, preheating and guiding the bottle.

[0024] like Figure 1 and Figure 2 The arc-shaped channel 13 allows the heat radiated from the inlet 112 of the heating channel 11 to preheat the arc-shaped channel 13 and the bottles on the conveyor belt 14. The arc-shaped channel 13 also increases the path of the hot air as it flows within the channel, allowing the heat at the inlet 112 of the heating channel 11 to be in contact with the bottles to be preheated for a longer period of time, reducing heat waste at the inlet 112 of the heating hood 111 and saving energy. The conveyor belt 14 changes the direction of bottle transport. The conveyor belt 14 and the conveying device 12 are L-shaped, reducing the floor space. When transporting the bottles into the heating hood 111, the bottles first pass through the protective cover 141 on the conveyor belt 14 and then through the arc-shaped cover 131 of the arc-shaped channel 13 for gradual preheating.

[0025] like Figure 1 and Figure 2 The structure of the heating channel 11 can be the heating channel 11 structure of a novel preheating bottle machine disclosed in patent CN114229763B. In this case, the heating channel 11 includes a heating cover 111 set on the frame 1. The two ends of the heating cover 111 are respectively provided with an inlet 112 for the conveying device 12 and an outlet 113 for the bottle body to be moved out and in. The reason why an arc-shaped channel 13 and a conveyor belt 14 are not set at the outlet 113 is because the bottle body moved out of the preheating bottle machine will enter the next process.

[0026] like Figure 1 and Figure 3The conveying device 12 includes a conveyor belt 121 with one end located outside the inlet 112 of the heating hood 111 and the other end passing through the heating hood 111 and exiting the outlet 113 of the heating hood 111. The conveyor belt 121 conveys the bottle body in and out of the heating hood 111. Both ends of the conveyor belt 121 are provided with H-shaped support frames 122 supported on the ground. The support frames 122 are placed vertically. The upper openings of the support frames 122 are rotatably connected to the opposite walls. The conveyor belt 121 is wound around the pulleys. One of the support frames 122 is provided with a motor (not shown in the figure) that drives the pulley to rotate. The inner wall of the cabinet is provided with baffles on both sides of the conveyor belt 121 at the end of the conveyor belt 121 located inside the cabinet. The baffles do not extend out of the inlet 112 of the heating hood 111.

[0027] like Figure 1 and Figure 2 The protective cover 141 above the conveyor belt 14 is distributed along the length of the conveyor belt 14. The arc-shaped channel 13 includes several support pillars 132 placed on the ground. The upper ends of each support pillar 132 are connected by a fixing plate 133. A circular groove 134 is opened on the upper surface of the fixing plate 133. A turntable 135 is rotatably connected to the fixing plate 133 within the circular groove 134. At this time, one side of the fixing plate 133 is parallel and close to the side of the conveyor belt 121, and the other side is parallel and close to the side of the conveyor belt 14. The upper surface of the turntable 135 is flush with the upper surface of the fixing plate 133. The bottom of the fixed plate 133 is equipped with a motor 136 that drives the turntable 135 to rotate. The upper surface of the fixed plate 133 is flush with the upper surface of the transmission belt 121 and the conveyor belt 14. One end of the arc-shaped cover 131 is fixed to the outer wall of the heating cover 111 and communicates with the inlet 112 of the heating cover 111. The other end is communicated with the protective cover 141 on the conveyor belt 14. The longitudinal section of the protective cover 141 and the arc-shaped cover 131 are both inverted U-shaped. The curvature of the arc-shaped cover 131 allows the bottle to be transferred from the transmission belt 121 to the turntable 135 and then to the conveyor belt 14.

[0028] like Figure 1 and Figure 3 The protective cover 141 on the conveyor belt 14 is provided with a downwardly extending closed plate 142 at the end away from the arc-shaped cover 131. There is a gap between the lower end face of the closed plate 142 and the conveyor belt 14. The closed plate 142 is provided with an insertion hole 143 for the bottle to be moved into the protective cover 141.

[0029] like Figure 1 and Figure 3A protective cover 141 extends from one end of the conveyor belt 14, and placement plates 15 are distributed on both sides of the extended end of the conveyor belt 14. The function of the placement plates 15 is to pre-place the bottles on the placement plates 15. The lower ends of the two placement plates 15 are provided with several uprights 151 extending to the ground and fixed to the ground. The length direction of each placement plate 15 is distributed along the length direction of the conveyor belt 14. The placement plates 15 are provided with moving parts to move the bottles placed on the placement plates 15 to the conveyor belt 14. At this time, the moving parts move the bottles on the placement plates 15 to the conveyor belt 14, and the bottles on both sides of the placement plates 15 are staggered.

[0030] like Figure 3 and Figure 4 The movable component includes horizontally distributed guide rails 152 arranged on opposite sides of two shelf panels 15. The height of the guide rails 152 is higher than the height of the shelf panels 15. Each guide rail 152 has a connecting rod 153 at both ends. The end of the connecting rod 153 away from the guide rail 152 is fixed to the upright 151. Sliding blocks 154 are slidably connected to both guide rails 152. The sliding blocks 154 are located on opposite sides of the two guide rails 152. The upper and lower ends of the two sliding blocks 154 extend beyond the upper and lower ends of the guide rails 152. The portions extending beyond the upper and lower ends of the guide rails 152 are provided with fixing blocks 155 that continue to extend towards the opposite sides of the two guide rails 152. A U-shaped guide strip 156 is provided between the fixing blocks 155 on the two guide rails 152. The two vertical sides of the guide strip 156 are respectively connected to the fixing blocks 155 on the two guide rails 152. The side between the two vertical sides is an arc-shaped side. The guide rails 152 are provided with a power component to drive the sliding blocks 154 to move.

[0031] like Figure 3 and Figure 4 At this point, the power component drives the slider 154 to move, which in turn moves the guide bar 156. This allows the two ends of the guide bar 156 to approach the bottle on the shelf 15, enabling the bottle to slide from the opposite ends of the guide bar 156 onto the curved edge. When the bottle is at the most curved part of the curved edge, it is on the conveyor belt 14, thus achieving the purpose of moving the bottle from the shelf 15 onto the conveyor belt 14. The speed at which the guide bar 156 moves is less than the speed at which the conveyor belt 14 transports the bottle. This allows the conveyor belt 14 to accelerate the transport speed of the bottle after it is guided, causing the bottle to move away from the guide bar 156.

[0032] like Figure 3 and Figure 4The power component includes elongated grooves 16 formed on opposite sides of two guide rails 152. A slider 154 is slidably connected within the grooves 16. A lead screw 161 is rotatably connected to the opposite wall of one of the grooves 16. The lead screw 161 passes through the slider 154 and is threadedly connected to it. A second motor 162 is mounted on the guide rails 152 to drive the lead screw 161 to rotate. The second motor 162 drives the lead screw 161 to rotate, thereby causing the lead screw 161 to drive the slider 154 to rotate within the grooves 16, facilitating the movement of the guide bar 156.

[0033] like Figure 3 and Figure 4 One end of the guide strip 156 extends to connect with the fixing block 155, facilitating contact between the guide strip 156 and the side wall of the bottle. The width of the guide strip 156 on the side contacting the guide rail 152 is greater than the width of the guide rail 152. Both the upper and lower end faces of the guide rail 152 are provided with moving grooves 163 distributed along its length. The guide strip 156 on the side facing the guide rail 152 has a moving block 164 that slides within the moving groove 163. The guide strip 156 is made of flexible plastic. The fixing block 155 is connected to the moving block 164. In this configuration, the moving block 164 ensures stable sliding of the guide strip 156 on the guide rail 152 and facilitates connection with the fixing block 155.

[0034] like Figure 3 and Figure 4 The fixed block 155 and the movable block 164 are detachably connected. A screw 165 is threaded onto the upper end face of the fixed block 155, and the screw 165 passes through the fixed block 155 and is threadedly connected to the movable block 164. This facilitates the disassembly and installation of the fixed block 155 and the movable block 164.

[0035] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. An energy-saving bottle preheating machine, comprising a frame (1), a heating channel (11) disposed on the frame (1), and a conveying device (12) for conveying and outputting bottles into and out of the heating channel (11), wherein the heating channel (11) is provided with air blowing channels for heating the bottle mouth, and the air blowing channels are provided in two and distributed on both sides of the bottle, characterized in that, The frame (1) has an arc-shaped channel (13) connected to the conveying device (12) at the inlet (112) of the heating channel (11). The arc-shaped channel (13) is provided with a conveyor belt (14) perpendicular to the length direction of the conveying device (12) at one end away from the conveying device (12). The frame (1) is provided with an arc-shaped cover (131) and a protective cover (141) covering the arc-shaped channel (13) and the conveyor belt (14), respectively. The lower end face of the arc-shaped cover (131) and the protective cover (141) are in contact with the upper end face of the arc-shaped channel (13) and the conveyor belt (14). One end of the conveyor belt (14) extends out of a protective cover (141), and at the extended end there are storage plates (15) located on both sides of the conveyor belt (14). The lower ends of the two storage plates (15) are provided with several uprights (151) extending to the ground and fixed on the ground. The length direction of each storage plate (15) is distributed along the length direction of the conveyor belt (14). The storage plate (15) is provided with a moving part for moving the bottle placed on the storage plate (15) to the conveyor belt (14). The movable component includes horizontally distributed guide rails (152) arranged on opposite sides of two shelf panels (15). The height of the guide rails (152) is higher than the height of the shelf panels (15). Each guide rail (152) has a connecting rod (153) at both ends. The end of the connecting rod (153) away from the guide rail (152) is fixed to the upright (151). Sliding sliders (154) are slidably connected to both guide rails (152). The sliders (154) are located on opposite sides of the two guide rails (152). The upper and lower ends of the two sliders (154) are... Both of them extend from the upper and lower ends of the guide rail (152), and the portions extending from the upper and lower ends of the guide rail (152) are provided with fixing blocks (155) that continue to extend towards the opposite sides of the two guide rails (152). A U-shaped guide strip (156) is provided between the fixing blocks (155) on the two guide rails (152). The two vertical sides of the guide strip (156) are respectively connected to the fixing blocks (155) on the two guide rails (152), and the side between the two vertical sides is an arc-shaped side. The guide rail (152) is provided with a power component for driving the slider (154) to move. The guide bar (156) moves at a speed less than the conveyor belt (14) conveys the bottles; the bottles on both sides of the shelf (15) are placed in a staggered manner.

2. The energy-saving preheating bottle machine as described in claim 1, characterized in that, The heating channel (11) includes a heating cover (111) installed on the frame (1), and the heating cover (111) has an inlet (112) and an outlet (113) at both ends for the conveying device (12) and the bottle to be moved out and in. The conveying device (12) includes a conveyor belt (121) with one end located outside the inlet (112) of the heating hood (111) and the other end passing through the heating hood (111) and exiting the outlet (113) of the heating hood (111). The conveyor belt (121) conveys the bottle body in and out of the heating hood (111). Both ends of the conveyor belt (121) are provided with H-shaped support frames (122) supported on the ground. Pulleys are rotatably connected to the opposite opening walls of the upper opening of the support frame (122). The conveyor belt (121) is wound around the pulleys, and one of the support frames (122) is provided with a motor that drives the pulleys to rotate.

3. The energy-saving preheating bottle machine as described in claim 2, characterized in that, The protective cover (141) above the conveyor belt (14) is distributed along the length of the conveyor belt (14). The arc-shaped channel (13) includes several pillars (132) placed on the ground. The upper ends of each pillar (132) are connected by a fixing plate (133). A circular groove (134) is opened on the upper surface of the fixing plate (133). A turntable (135) is rotatably connected to the fixing plate (133) in the circular groove (134). The upper surface of the turntable (135) is flush with the upper surface of the fixing plate (133). The bottom of the fixed plate (133) is provided with a motor (136) that drives the turntable (135) to rotate. The upper surface of the fixed plate (133) is flush with the upper surface of the transmission belt (121) and the conveyor belt (14). One end of the arc-shaped cover (131) is fixed on the outer wall of the heating cover (111) and communicates with the inlet (112) of the heating cover (111). The other end is communicated with the protective cover (141) on the conveyor belt (14). The longitudinal section of the protective cover (141) and the arc-shaped cover (131) are both inverted U-shaped.

4. The energy-saving preheating bottle machine as described in claim 1, characterized in that, The protective cover (141) on the conveyor belt (14) has a downwardly extending closed plate (142) at the end away from the arc-shaped cover (131), and the closed plate (142) has an insertion hole (143) for the bottle to be moved into the protective cover (141).

5. The energy-saving preheating bottle machine as described in claim 1, characterized in that, The power component includes an elongated groove (16) formed on one side of two guide rails (152) facing away from each other. The slider (154) is slidably connected in the groove (16). A lead screw (161) is rotatably connected to the opposite wall of one of the grooves (16). The lead screw (161) passes through the slider (154) and is threadedly connected to the slider (154). The guide rail (152) is provided with a second motor (162) to drive the lead screw (161) to rotate.

6. An energy-saving preheating bottle machine as described in claim 1 or 5, characterized in that, One end of the guide strip (156) extends to a position connected to the fixed block (155), and the width of the guide strip (156) on the side that contacts the guide rail (152) is greater than the width of the guide rail (152). The upper and lower end faces of the guide rail (152) are provided with moving grooves (163) distributed along the length direction of the guide rail (152). The guide strip (156) on the side facing the guide rail (152) is provided with a moving block (164) that slides in the moving groove (163). The material of the guide strip (156) is flexible plastic, and the fixed block (155) is connected to the moving block (164).

7. The energy-saving bottle preheating machine as described in claim 6, characterized in that, The fixed block (155) and the movable block (164) are detachably connected. The upper end face of the fixed block (155) is threaded with a screw (165), which passes through the fixed block (155) and is threadedly connected to the movable block (164).

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