Invisible protective window tensioning tool, invisible protective window manufacturing method and invisible protective window
By using a tensioning fixture for invisible window protectors and driving the positioning rod spacing to change via a drive mechanism, the problems of high labor intensity and difficulty in tightening steel wire ropes in the manufacturing of invisible window protectors are solved, achieving efficient and low-cost production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-18
- Publication Date
- 2026-04-14
AI Technical Summary
The manufacturing process of invisible window protectors is labor-intensive and cumbersome, and it is difficult to ensure that the steel wire rope is taut to the appropriate degree, resulting in low manufacturing efficiency.
The invisible protective window tensioning fixture includes a frame, positioning rods, and a drive mechanism. The steel wire rope is tensioned by changing the spacing of the positioning rods through the drive mechanism, which simplifies the operation process.
It reduces the labor intensity of workers, improves manufacturing efficiency and quality, facilitates large-scale mass production, and reduces production costs.
Smart Images

Figure CN116856837B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of invisible window protection manufacturing technology, specifically to an invisible window protection tensioning fixture, an invisible window protection manufacturing method, and an invisible window protection made using the invisible window protection tensioning fixture. Background Technology
[0002] like Figure 1 As shown, the invisible window guard 100 refers to a building security product installed on the outside of windows and balconies to provide protection, anti-theft, and anti-falling object security. The invisible window guard 100 includes two parallel horizontal frame frames 101, a steel wire rope 102 threaded between the two horizontal frame frames 101, and multiple vertical frame frames 103 connected between the two horizontal frame frames 101. In the manufacturing process of the invisible window guard 100, the two horizontal frame frames 101 and the multiple vertical frame frames 103 are first fixedly connected to form a square frame. Then, one end of the steel wire rope 102 is fixed to the horizontal frame frame 101, and then it is continuously wound around the connecting bolts inside the two horizontal frame frames 101. The steel wire rope 102 is tightened manually one by one, and finally, the other end of the steel wire rope 102 is fixed to the horizontal frame frame 101. This process is not only labor-intensive and cumbersome, resulting in low manufacturing efficiency, but also makes it difficult to ensure that the steel wire rope is taut at the appropriate level. Summary of the Invention
[0003] In view of the above, the present invention provides a concealed window tensioning fixture, a concealed window manufacturing method, and a concealed window made using the concealed window tensioning fixture, so as to simplify manufacturing operations, reduce labor intensity, and improve manufacturing efficiency and quality.
[0004] The technical solution of this invention:
[0005] This invention provides a concealed window protection tensioning fixture. The concealed window protection includes a horizontal frame, a steel wire rope, and a vertical frame. The concealed window protection tensioning fixture includes a frame, a positioning rod, and a drive mechanism.
[0006] Two parallel positioning rods are set on the frame with adjustable spacing so that the two transverse frame edges are positioned on the two positioning rods at intervals for winding steel wire ropes.
[0007] The drive mechanism is mounted on the frame and connected to at least one positioning rod to drive the two positioning rods to move closer or further apart. The drive mechanism increases the distance between the two positioning rods, thereby tightening the steel wire ropes wound on the two transverse frames.
[0008] Furthermore, the positioning rod includes a rod body and a plurality of positioning blocks spaced apart on the rod body along the extension direction of the rod body, and the plurality of positioning blocks on each rod body form a positioning surface that abuts against the inner side of the transverse frame.
[0009] Alternatively, the positioning rod may be an L-shaped rod to form a positioning groove that accommodates the transverse frame.
[0010] Furthermore, the driving mechanism includes a telescopic driving component mounted on the frame, the telescopic driving end of which is connected to the positioning rod to drive the positioning rod to slide and adjust the distance between the two positioning rods.
[0011] Furthermore, the drive mechanism also includes a hinge seat and a pin. The telescopic drive member is connected to the positioning rod through the hinge seat. The hinge seat is hinged to the frame through the pin. The bottom end of the hinge seat is hinged to the telescopic drive end of the telescopic drive member, and the top end of the hinge seat is hinged to the positioning rod.
[0012] Furthermore, the drive mechanism also includes a telescopic adjustment component, one end of which is hinged to the top of the hinge seat, and the other end of which is connected to the positioning rod, so as to adjust the distance between the two positioning rods by telescopic adjustment of the telescopic adjustment component.
[0013] Furthermore, the telescopic adjustment assembly includes a spherical bearing, a screw, and a nut. One end of the spherical bearing is hinged to the top of the hinge seat, and the other end of the spherical bearing has a screw hole. The screw hole end of the spherical bearing passes through the positioning rod. The screw is rotatably passed through the positioning rod and screwed to the screw hole end of the spherical bearing. Two nuts are screwed onto the screw. The two nuts are clamped on the inner and outer walls of the positioning rod to allow the positioning rod to slide.
[0014] Furthermore, the invisible window tensioning fixture also includes a sliding guide mechanism, and at least one positioning rod is slidably mounted on the frame through the sliding guide mechanism.
[0015] The present invention also provides a method for manufacturing invisible window protectors, comprising the following steps:
[0016] Clamp and fix the two horizontal frame pieces in parallel with spacing between them;
[0017] Fix one end of the wire rope to the horizontal frame, and then continuously wind the wire rope around the multiple connecting ends of the two horizontal frames.
[0018] The other end of the steel wire rope is fixed to the horizontal frame, thereby connecting the two horizontal frames to form a protective fence made of multiple parallel steel wire ropes.
[0019] Pushing the two positioning rods away from each other increases the distance between them, thereby tightening the steel wire rope connecting the two transverse frames.
[0020] Multiple vertical borders are fixed between two horizontal borders at intervals.
[0021] This invention also provides a method for manufacturing invisible window protectors, using the aforementioned invisible window protector tensioning fixture.
[0022] Includes the following steps:
[0023] Position the two horizontal frame pieces onto the two positioning rods respectively and fix them with clamps;
[0024] Fix one end of the wire rope to the horizontal frame, and then continuously wind the wire rope around the multiple connecting ends of the two horizontal frames.
[0025] The other end of the steel wire rope is fixed to the horizontal frame, thereby connecting the two horizontal frames to form a protective fence made of multiple parallel steel wire ropes.
[0026] The drive mechanism drives the two positioning rods to move away from each other, increasing the distance between the two positioning rods and thus tightening the steel wire rope connecting the two transverse frames.
[0027] Multiple vertical borders are fixed between two horizontal borders at intervals;
[0028] The invisible window can be removed by driving the two positioning rods closer together using a drive mechanism.
[0029] The present invention also provides an invisible window protector, which is manufactured using the aforementioned invisible window protector tensioning fixture.
[0030] The beneficial effects of this invention are:
[0031] Compared with existing technologies, the invisible window protector tensioning fixture provided by this invention utilizes two parallel positioning rods arranged on a frame in conjunction with a drive mechanism. Two horizontal frame sections are respectively positioned on the two positioning rods and fixed with clamps; one end of a steel wire rope is fixed to the horizontal frame section, and then the steel wire rope is continuously wound around the connecting end inside the two horizontal frame sections; the other end of the steel wire rope is fixed to the horizontal frame section, thereby connecting multiple parallel steel wire rope segments to form a protective barrier between the two horizontal frame sections; the drive mechanism drives the two positioning rods away from each other, increasing the distance between the two positioning rods, thereby tightening the steel wire rope connecting the two horizontal frame sections; multiple vertical frame sections are fixed at intervals between the two horizontal frame sections; the drive mechanism drives the two positioning rods closer together, allowing the invisible window protector to be removed. Compared with the manual tensioning method used in the prior art, the invisible window protection tensioning fixture of the present invention has a simple structure and is easy to operate. It is easy to tighten the steel wire rope, which helps to ensure that the steel wire rope is taut to an appropriate degree, reduces the labor intensity of workers, improves the manufacturing efficiency and quality of invisible windows, facilitates the large-scale mass production of invisible windows, significantly reduces production costs, and has broad market prospects.
[0032] Compared with existing technologies, the present invention's method for manufacturing invisible window protectors creatively and for the first time employs a manufacturing process that involves first winding a steel wire rope between two horizontal frame members, then tightening the steel wire rope by pulling apart the two horizontal frame members, and finally fixing multiple vertical frame members between the two horizontal frame members. This method is simple to operate, facilitates the tightening of the steel wire rope, helps ensure that the steel wire rope is taut at an appropriate level, reduces the labor intensity of workers, improves the manufacturing efficiency and quality of invisible window protectors, facilitates large-scale mass production of invisible window protectors, significantly reduces production costs, and has broad market prospects.
[0033] The preferred embodiments of the present invention and their beneficial effects will be further described in detail with reference to specific implementation methods. Attached Figure Description
[0034] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but should not be construed as limiting the invention. In the drawings,
[0035] Figure 1 This is a perspective view of the invisible window protector involved in the present invention;
[0036] Figure 2 This is a perspective view of the concealed window guard tensioning fixture of the present invention;
[0037] Figure 3 This is a top view of the invisible window protection tensioning fixture of the present invention;
[0038] Figure 4 This is a front view of the invisible window protection tensioning fixture of the present invention;
[0039] Figure 5 This is a side view of the invisible window protection tensioning fixture of the present invention;
[0040] Figure 6 This is a reference diagram showing the usage state of the invisible window protection tensioning fixture of the present invention.
[0041] The reference numerals in the attached diagrams are as follows: 100 for the concealed window guard, 101 for the horizontal frame, 102 for the steel wire rope, 103 for the vertical frame, 1 for the frame, 2 for the positioning rod, 3 for the drive mechanism, 21 for the rod body, 22 for the positioning block, 31 for the telescopic drive component, 32 for the hinge seat, 33 for the pin, 34 for the telescopic adjustment component, 341 for the joint bearing, 342 for the screw, 343 for the nut, 4 for the sliding guide mechanism, 41 for the guide shaft, 42 for the shaft seat, and 43 for the sliding sleeve. Detailed Implementation
[0042] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.
[0043] Please see Figures 2 to 6 This invention provides a tensioning fixture for a concealed window protector 100. The concealed window protector 100 includes two horizontal frame frames 101, a steel wire rope 102, and multiple vertical frame frames 103. The tensioning fixture includes a frame 1, positioning rods 2, and a drive mechanism 3. Two parallel positioning rods 2 are adjustablely spaced on the frame 1. Each positioning rod 2 includes a rod body 21 and multiple positioning blocks 22 spaced along the extension direction of the rod body 21. The multiple positioning blocks 22 on each rod body 21 form a positioning surface that abuts against the inner side of the horizontal frame frame 101, so that the two horizontal frame frames 101 are positioned spaced apart on the corresponding rod body 21 by the positioning blocks 22 for winding the steel wire rope 102. The drive mechanism 3 is mounted on the frame 1 and connected to at least one positioning rod 2 to drive the two positioning rods 2 to move closer or further apart. The drive mechanism 3 increases the distance between the two positioning rods 2, thereby tightening the steel wire ropes 102 wound on the two transverse frame 101.
[0044] The invisible window protection tensioning fixture provided by the present invention is achieved by cooperating with two parallel positioning rods 2 and a drive mechanism 3 arranged on the frame 1. First, position the two horizontal frame pieces 101 onto the two positioning rods 2 and fix them with clamps, so that the inner side of each horizontal frame piece 101 abuts against the positioning surface formed by the corresponding multiple positioning blocks 22; then fix one end of the steel wire rope 102 to the horizontal frame piece 101, and then continuously wind the steel wire rope 102 around the connecting bolts inside the two horizontal frame pieces 101; then fix the other end of the steel wire rope 102 to the horizontal frame piece 101, thereby connecting the two horizontal frame pieces 101 to form a protective railing formed by multiple parallel steel wire rope segments 102; then drive the two positioning rods 2 away from each other through the drive mechanism 3, thereby increasing the distance between the two positioning rods 2, thereby tightening the steel wire rope 102 connecting the two horizontal frame pieces 101; then fix multiple vertical frame pieces 103 at intervals between the two horizontal frame pieces 101; then drive the two positioning rods 2 closer together through the drive mechanism 3, and the invisible window guard 100 can be removed. Compared with the manual tensioning method used in the prior art, the invisible window protection tensioning fixture of the present invention has a simple structure and is easy to operate, making it easy to tension the steel wire rope 102. This helps to ensure that the steel wire rope 102 is taut to an appropriate degree, reduces the labor intensity of workers, improves the manufacturing efficiency and quality of invisible windows, facilitates large-scale mass production of invisible windows, significantly reduces production costs, and has broad market prospects.
[0045] In this embodiment, the positioning rod 2 is formed by the cooperation of a rod body 21 and multiple positioning blocks 22, but it is not limited to this. As long as the two transverse frame edges 101 can be positioned at intervals on the two positioning rods 2, the two transverse frame edges 101 can be kept at a specified positioning distance when the wire rope 102 is wound. For example, the positioning rod 2 can be a rod body with an L-shaped cross-section, which can form a positioning groove to accommodate the transverse frame edges 101, thus achieving the purpose of positioning the transverse frame edges 101.
[0046] In this embodiment, three sets of drive mechanisms 3 are arranged in parallel. Each set of drive mechanisms 3 includes a telescopic drive component 31 mounted on the frame 1. The telescopic drive end of the telescopic drive component 31 is connected to the positioning rod 2, thereby driving the positioning rod 2 to slide and adjust the distance between the two positioning rods 2. By using the telescopic action of the telescopic drive component 31 to drive the distance between the two positioning rods 2 to change, the state switching between two distances can be realized, thereby realizing the state switching between winding and tightening the wire rope 102. The drive action is simple and quick, making it easy to quickly tighten the wire rope 102, which is beneficial to improving manufacturing efficiency. The telescopic drive component 31 can be a cylinder, hydraulic cylinder, or electric cylinder, etc.
[0047] In this embodiment, the drive mechanism 3 further includes a hinge seat 32 and a pin 33. The telescopic drive member 31 is connected to the positioning rod 2 via the hinge seat 32. The hinge seat 32 is hinged to the frame 1 via the pin 33, with its bottom end hinged to the telescopic drive end of the telescopic drive member 31 and its top end hinged to the positioning rod 2. This allows the telescopic drive member 31 to be positioned below the positioning rod 2 without affecting the operating space on the positioning rod 2.
[0048] In this embodiment, the drive mechanism 3 further includes a telescopic adjustment component 34. One end of the telescopic adjustment component 34 is hinged to the top of the hinge seat 32, and the other end is connected to the positioning rod 2. The telescopic adjustment component 34 can be extended or retracted to adjust the distance between the two positioning rods 2, thereby enabling the manufacture of invisible window guards 100 of different heights and improving the versatility of the equipment. When the telescopic adjustment component 34 extends, it moves one positioning rod 2 closer to the other positioning rod 2; when the telescopic adjustment component 34 retracts, it moves one positioning rod 2 away from the other positioning rod 2. This makes the distance between the two horizontal frame edges 101 on the two positioning rods 2 adjustable, thus facilitating the manufacture of invisible window guards 100 of different heights.
[0049] In this embodiment, the telescopic adjustment assembly 34 includes a spherical bearing 341, a screw 342, and nuts 343. One end of the spherical bearing 341 is hinged to the top of the hinge seat 32, and the other end of the spherical bearing 341 has a threaded hole. The threaded end of the spherical bearing 341 passes through the positioning rod 2. The screw 342 is rotatably passed through the positioning rod 2 and screwed to the threaded end of the spherical bearing 341. Two nuts 343 are screwed onto the screw 342, and the two nuts 343 are clamped on the inner and outer walls of the positioning rod 2 to allow the positioning rod 2 to slide. By rotating the screw 342, the extension length of the screw 342 relative to the spherical bearing 341 can be adjusted, thereby adjusting the position of the positioning rod 2. This structure is simple and the adjustment is convenient.
[0050] In this embodiment, the invisible window tensioning fixture also includes a sliding guide mechanism 4, through which at least one positioning rod 2 is slidably mounted on the frame 1. Two sets of the sliding guide mechanism 4 are provided to ensure sliding stability. The sliding guide mechanism 4 includes a guide shaft 41, a bearing 42, and a sliding sleeve 43. Both ends of the guide shaft 41 are mounted on the frame 1 via the bearing 42. The guide shaft 41 is located below the positioning rod 2 and parallel to the horizontal plane formed by the two positioning rods 2, and is perpendicular to each positioning rod 2. The sliding sleeve 43 is slidably fitted onto the guide shaft 41 and is connected to the positioning rod 2. In other embodiments, the sliding guide mechanism 4 may employ a mechanism combining a slide rail and a slider.
[0051] In this embodiment, the frame 1 adopts a rectangular frame structure welded from square tubes to accommodate the positioning rod 2, the drive mechanism 3, and the sliding guide mechanism 4.
[0052] The present invention also provides a method for manufacturing invisible window protectors, comprising the following steps:
[0053] The two horizontal frame pieces 101 are clamped and fixed in parallel at intervals;
[0054] One end of the wire rope 102 is fixed to the horizontal frame 101, and then the wire rope 102 is continuously wound around the connecting bolts (or connecting holes) inside the two horizontal frames 101.
[0055] The other end of the steel wire rope 102 is fixed to the horizontal frame 101, thereby connecting the two horizontal frames 101 to form a protective fence formed by multiple parallel steel wire ropes 102.
[0056] Pushing the two positioning rods 2 away from each other increases the distance between the two positioning rods 2, thereby tightening the steel wire rope 102 connecting the two transverse frame 101;
[0057] Multiple vertical borders 103 are fixed at intervals between two horizontal borders 101.
[0058] The aforementioned method for manufacturing invisible window protectors creatively employs a novel manufacturing process: first, a steel wire rope 102 is wound between two horizontal frame frames 101; then, the steel wire rope 102 is tightened by pulling apart the two horizontal frame frames 101; finally, multiple vertical frame frames 103 are fixed between the two horizontal frame frames 101. This method is simple to operate, facilitates the tightening of the steel wire rope 102, helps ensure that the steel wire rope 102 is taut at an appropriate level, reduces the labor intensity of workers, improves the manufacturing efficiency and quality of invisible window protectors, facilitates large-scale mass production of invisible window protectors, significantly reduces production costs, and has broad market prospects.
[0059] The present invention also provides a method for manufacturing a concealed window using the above-mentioned concealed window tensioning fixture, comprising the following steps:
[0060] Position the two horizontal frame pieces 101 onto the two positioning rods 2 respectively and fix them with clamps;
[0061] One end of the wire rope 102 is fixed to the horizontal frame 101, and then the wire rope 102 is continuously wound around the connecting bolts inside the two horizontal frames 101.
[0062] The other end of the steel wire rope 102 is fixed to the horizontal frame 101, thereby connecting the two horizontal frames 101 to form a protective fence formed by multiple parallel steel wire ropes 102.
[0063] The driving mechanism 3 drives the two positioning rods 2 to move away from each other, thereby increasing the distance between the two positioning rods 2 and tightening the steel wire rope 102 connecting the two transverse frame 101.
[0064] Multiple vertical borders 103 are fixed at intervals between two horizontal borders 101;
[0065] The invisible window 100 can be removed by driving the two positioning rods 2 closer together through the drive mechanism 3.
[0066] The present invention also provides an invisible window that is manufactured using the above-mentioned invisible window tensioning fixture.
[0067] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying importance; the terms "bottom surface" and "top surface," "inner" and "outer" respectively refer to the geometric direction toward or away from a specific component.
[0068] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.
[0069] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A fastening fixture for an invisible window protector, the invisible window protector (100) comprising a horizontal frame (101), a steel wire rope (102), and a vertical frame (103), characterized in that, The invisible window protection tensioning fixture includes a frame (1), a positioning rod (2), and a drive mechanism (3); Two parallel positioning rods (2) are set on the frame (1) with adjustable spacing so that two transverse frame pieces (101) are positioned on the two positioning rods (2) at intervals for winding steel wire ropes (102); The drive mechanism (3) is installed on the frame (1) and connected to at least one positioning rod (2) to drive the two positioning rods (2) to move closer or further apart. After the wire rope (102) is wound, the drive mechanism (3) drives the distance between the two positioning rods (2) to increase, thereby tightening the wire rope (102) wound on the two transverse frames (101). The drive mechanism (3) includes a telescopic drive component (31) mounted on the frame (1). The telescopic drive end of the telescopic drive component (31) is connected to the positioning rod (2) to drive the positioning rod (2) to slide and adjust the distance between the two positioning rods (2). The drive mechanism (3) also includes a hinge seat (32) and a pin (33). The telescopic drive member (31) is connected to the positioning rod (2) through the hinge seat (32). The hinge seat (32) is hinged to the frame (1) through the pin (33). The bottom end of the hinge seat (32) is hinged to the telescopic drive end of the telescopic drive member (31), and the top end of the hinge seat (32) is hinged to the positioning rod (2).
2. The invisible window protection tensioning fixture according to claim 1, characterized in that, The positioning rod (2) includes a rod body (21) and a plurality of positioning blocks (22) installed at intervals on the rod body (21) along the extension direction of the rod body (21). The plurality of positioning blocks (22) on each rod body (21) form a positioning surface that abuts against the inner side of the transverse frame (101). Alternatively, the positioning rod (2) may be an L-shaped rod to form a positioning groove for accommodating the transverse frame (101).
3. The invisible window protection tensioning fixture according to claim 1, characterized in that, The drive mechanism (3) further includes a telescopic adjustment component (34), one end of which is hinged to the top of the hinge seat (32), and the other end of which is connected to the positioning rod (2) so as to adjust the distance between the two positioning rods (2) by telescopic adjustment component (34).
4. The invisible window protection tensioning fixture according to claim 3, characterized in that, The telescopic adjustment assembly (34) includes a spherical bearing (341), a screw (342), and a nut (343). One end of the spherical bearing (341) is hinged to the top of the hinge seat (32), and the other end of the spherical bearing (341) has a screw hole. The screw hole end of the spherical bearing (341) passes through the positioning rod (2). The screw (342) is rotatably passed through the positioning rod (2) and screwed to the screw hole end of the spherical bearing (341). Two nuts (343) are screwed onto the screw (342). The two nuts (343) are clamped on the inner and outer walls of the positioning rod (2) for pushing and pulling the positioning rod (2) to slide.
5. The invisible window protection tensioning fixture according to claim 1, characterized in that, The invisible window tensioning fixture also includes a sliding guide mechanism (4), and at least one positioning rod (2) is slidably mounted on the frame (1) through the sliding guide mechanism (4).
6. A method for manufacturing an invisible window protector, characterized in that, Manufacturing using the invisible window guard tensioning fixture as described in any one of claims 1-5 includes the following steps: positioning the two horizontal frame pieces (101) on the two positioning rods (2) respectively and fixing them with clamps; One end of the wire rope (102) is fixed to the horizontal frame (101), and then the wire rope (102) is continuously wound around the multiple connecting ends of the two horizontal frames (101). The other end of the wire rope (102) is fixed to the horizontal frame (101), thereby connecting the two horizontal frames (101) to form a protective fence formed by multiple parallel wire ropes (102). The two positioning rods (2) are driven away from each other by the driving mechanism (3), which increases the distance between the two positioning rods (2) and thus tightens the steel wire rope (102) connecting the two transverse frames (101). Multiple vertical borders (103) are fixed at intervals between two horizontal borders (101); The invisible window (100) can be removed by driving the two positioning rods (2) closer together through the drive mechanism (3).
Citation Information
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