Glass carrying device

Abstract

The utility model discloses a glass carrying device which comprises a cross beam, a longitudinal beam, a suction cup, a vacuum generator and a handle. The number of the cross beams is two, the two cross beams are parallel to each other, the length of the cross beams is telescopic, the two cross beams are connected through the longitudinal beams, and a plurality of suction cups are arranged on the cross beams. The vacuum generator is arranged on the cross beam and / or the longitudinal beam and connected with the suction cups through air pipes, and handles are arranged at the two ends of the cross beam. The glass carrying device can be used for carrying large-size glass, the carrying difficulty of the large-size glass is lowered, good safety is achieved in the using process, and the glass can be well prevented from falling off and hurting operators.

Description

Technical Field

[0001] The utility model relates to the technical field of glass manufacturing, in particular to a glass conveying device. Background Art

[0002] With the development of the optical glass industry, the market demand for optical glass is increasing. In the process of cutting glass on the machine, the glass raw materials need to be transported to the cutting table, and then cut according to the drawing size. For example, the Chinese utility model with application number CN202020379633.9 provides a suction cup fixing frame for glass installation, which usually needs to cooperate with an industrial robot to realize the handling of glass.

[0003] Since the installation of industrial robots requires a large space, they cannot be installed in some small space conditions. In this case, manual handling of glass is required. However, the glass handling devices in the prior art have the disadvantages of complex structure, heavy weight, and high manufacturing cost, which are not suitable for manual operation. During manual handling of glass, for large-sized glass products with a thickness of more than 2.0 mm, two people are required to cooperate in handling during the cutting process. Since the glass raw materials are thick, large, and heavy, it is very difficult for the staff to handle them, and there is a safety hazard of glass falling and causing injuries. Utility Model Content

[0004] A technical problem to be solved by the present application is that in the prior art, it is difficult to transport large-sized glass, and there is a safety hazard of glass falling and causing personal injury.

[0005] The utility model provides a glass conveying device to solve the deficiencies of the prior art.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A glass handling device comprises a crossbeam, a longitudinal beam, a suction cup, a vacuum generator and a handle. There are two crossbeams, which are parallel to each other and can be extended in length. The two crossbeams are connected by the longitudinal beam, and a plurality of suction cups are arranged on the crossbeam; the vacuum generator is arranged on the crossbeam and / or the longitudinal beam and is connected to the suction cup through an air pipe, and handles are arranged at both ends of the crossbeam.

[0008] In some embodiments, the crossbeam includes a first cross bar and a second cross bar, the first cross bar is provided with a first socket, one end of the second cross bar is inserted into the first socket and can slide in the first socket along the length direction of the first cross bar, and the first cross bar and the second cross bar are both provided with suction cups and handles.

[0009] In some embodiments, the glass handling device also includes a first positioning pin, the first cross bar is provided with a plurality of first positioning holes connected to the first insertion hole, the plurality of first positioning holes are spaced apart along the length direction of the first cross bar, and the second cross bar is provided with a second positioning hole, and the first positioning pin can be inserted into the first positioning hole and the second positioning hole at the same time.

[0010] In some embodiments, the glass handling device also includes a first elastic member, a first chamber is provided in the second cross bar, the first elastic member is provided in the first chamber, one end of the first elastic member is fixed to the inner wall of the second cross bar, the first positioning pin is connected to the other end of the first elastic member, and the first elastic member presses the first positioning pin to be inserted into the second positioning hole; when the second positioning hole coincides with the first positioning hole, the first elastic member presses the first positioning pin to be inserted into the second positioning hole and the first positioning hole at the same time.

[0011] In some embodiments, the first elastic member is a U-shaped first elastic sheet, one end of the first elastic sheet is fixedly connected to the inner wall of the second cross bar, and the other end of the first elastic sheet is connected to the first positioning pin.

[0012] In some embodiments, there are multiple longitudinal beams, and the first cross bars on two cross beams are connected by a portion of the longitudinal beam, and the second cross bars on the two cross beams are connected by another portion of the longitudinal beam.

[0013] In some embodiments, the length of the stringer is telescopic.

[0014] In some embodiments, the longitudinal beam includes a first longitudinal rod and a second longitudinal rod, the first longitudinal rod is provided with a second insertion hole, one end of the second longitudinal rod is inserted into the second insertion hole and can slide in the second insertion hole along the length direction of the first longitudinal rod.

[0015] In some embodiments, the glass handling device also includes a second positioning pin, the first longitudinal rod is provided with a plurality of third positioning holes connected to the second insertion hole, the plurality of third positioning holes are spaced apart along the length direction of the first longitudinal rod, the second longitudinal rod is provided with a fourth positioning hole, and the second positioning pin can be inserted into the third positioning hole and the fourth positioning hole at the same time.

[0016] In some embodiments, the glass handling device also includes a U-shaped second spring piece, a second chamber is provided in the second longitudinal rod, the second spring piece is provided in the second chamber, one end of the second spring piece is fixed to the inner wall of the second longitudinal rod, and the other end of the second spring piece is connected to the second positioning pin, and the second spring piece presses the second positioning pin to insert into the fourth positioning hole; when the fourth positioning hole coincides with the third positioning hole, the second spring piece presses the second positioning pin to insert into the fourth positioning hole and the third positioning hole at the same time.

[0017] Through the above technical scheme, the glass handling device provided by the utility model can be used for handling large-sized glass, thereby reducing the difficulty of handling large-sized glass, and has good safety during use, which can effectively prevent glass from falling and injuring workers; in addition, the glass handling device can also be freely adjusted according to the size of the glass, thereby further improving the stability and safety during the handling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a stereogram of an embodiment of the utility model.

[0020] Figure 2 It is a partial cross-sectional view of the crossbeam in the embodiment of the utility model.

[0021] Figure 3 It is a diagram of the internal structure of the crossbeam in the embodiment of the utility model.

[0022] Figure 4 This is a partial enlarged view of point A in 3.

[0023] Figure 5 yes Figure 2 Schematic diagram of the beam after it is shortened to a certain length.

[0024] Figure 6 It is a structural diagram of the longitudinal beam in the embodiment of the utility model.

[0025] Figure 7 It is an internal structure diagram of the longitudinal beam in the embodiment of the utility model.

[0026] Figure 8 This is a partial enlarged view of point B in 7.

[0027] Fig. 9 It is a structural diagram of the first elastic member in an embodiment of the utility model.

[0028] The following are the descriptions of the reference numerals:

[0029] In the figure: 1. cross beam; 101. first cross bar; 1011. first plug hole; 1012. first positioning hole; 102. second cross bar; 1021. second positioning hole; 1022. first chamber; 2. longitudinal beam; 201. first longitudinal bar; 2011. second plug hole; 2012. third positioning hole; 202. second longitudinal bar; 2021. fourth positioning hole; 2022. second chamber; 3. suction cup; 4. vacuum generator; 5. handle; 6. first positioning pin; 7. first elastic member; 8. second positioning pin; 9. second spring piece; 10. angle code. DETAILED DESCRIPTION

[0030] The following is a further detailed description of the implementation methods of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions of the following examples and the accompanying drawings are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application. The present application can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0031] The present application provides these embodiments to make the present application thorough and complete, and to fully express the scope of the present application to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0032] It should be noted that, in the description of this application, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0033] In addition, the words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0034] It should also be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0035] All terms used in this application have the same meaning as those understood by those of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0036] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0037] See also Figure 1-Figure 9 As shown, the utility model provides a glass handling device, which includes a crossbeam 1, a longitudinal beam 2, a suction cup 3, a vacuum generator 4 and a handle 5. There are two crossbeams 1, which are parallel to each other and have a retractable length. The two crossbeams 1 are connected by the longitudinal beam 2. Four suction cups 3 are arranged on each crossbeam 1, and the four suction cups 3 on each crossbeam 1 are equidistantly spaced along the length direction of the crossbeam 1. The vacuum generator 4 is installed on the crossbeam 1 and connected to the suction cup 3 through an air pipe. A handle 5 is provided at both ends of each crossbeam 1. In other embodiments, the vacuum generator 4 can also be installed on the longitudinal beam 2, or the vacuum generator 4 is fixedly connected to the crossbeam 1 and the longitudinal beam 2 at the same time.

[0038] When in use, the user can change the length of the beam 1 by extending or retracting the beam 1; when it is necessary to transport longer glass, the length of the beam 1 can be lengthened by manual adjustment, and the distance between the suction cups 3 at both ends of the beam 1 can be increased, so that the suction cups 3 can adsorb the two ends of the glass plate, thereby improving the stability and safety of the glass handling device when transporting longer glass; obviously, when the glass to be transported is shorter, the length of the beam 1 can also be shortened to make the glass handling device adapt to the size of the glass to be transported.

[0039] The glass handling device requires the cooperation of two operators (operator A and operator B) during use. Before starting the operation, the vacuum generator 4 is first connected to the air pump through the air pipe to check whether the air circuit can operate normally. After confirming that the air circuit can be used normally, operator A holds the two handles 5 at the left end of the beam 1 with both hands, and operator B holds the two handles 5 at the right end of the beam 1 with both hands. The two operators lift the glass handling device together and then gently place it on the glass to be handled. Then operators A and B press the beam 1 or the longitudinal beam 2 at the same time to make the suction cup 3 absorb the glass to be handled. Then operator A operates the vacuum pump 4 to remove the glass. The control valve on the generator 4 makes the vacuum generator 4 operate and generate negative pressure, so that the suction cup 3 can firmly absorb the glass; then operator A holds the two handles 5 at the left end of the beam 1 again, and operator B holds the two handles 5 at the right end of the beam 1 again, and they jointly lift the glass handling device that adsorbs the glass, and slowly transport the glass to the cutting platform of the cutting machine. After comparing with the positioning column on the cutting platform, operator A controls the control valve on the vacuum generator 4 to make the vacuum generator 4 generate positive pressure, so that the suction cup 3 is separated from the glass; next, operators A and B lift the glass handling device at the same time, move it to the corresponding position to transport the next piece of glass.

[0040] In some embodiments, in order to realize the scalability of the crossbar 1, the crossbar 1 includes a first crossbar 101 and a second crossbar 102. The first crossbar 101 is provided with a first insertion hole 1011. One end of the second crossbar 102 is inserted into the first insertion hole 1011 and can slide in the first insertion hole 1011 along the length direction of the first crossbar 101. The first crossbar 101 and the second crossbar 102 are both provided with two suction cups 3 and a handle 5. In specific implementation, the first crossbar 101 and the second crossbar 102 can both be hollow square tubes, and the hollow structure inside the first crossbar 101 constitutes the aforementioned first insertion hole 1011. The size of the second crossbar 102 is smaller than that of the first crossbar 101, so that the second crossbar 102 can be inserted into the first insertion hole 1011 of the first crossbar 101.

[0041] In some embodiments, the glass handling device also includes a first positioning pin 6, the first cross bar 101 is provided with a plurality of first positioning holes 1012 connected to the first insertion hole 1011, the plurality of first positioning holes 1012 are equidistantly spaced along the length direction of the first cross bar 101, and the second cross bar 102 is provided with a second positioning hole 1021, and the first positioning pin 6 can be inserted into the first positioning hole 1012 and the second positioning hole 1021 at the same time. When the first locating pin 6 is inserted into the first locating hole 1012 and the second locating hole 1021 at the same time, the first locating pin 6 prevents the second cross bar 102 from moving relative to the first cross bar 101, and the beam 1 cannot shrink at this time; when the first locating pin 6 is removed from the first locating hole 1012 and / or the second locating hole 1021, the second cross bar 1 can slide along the length direction of the first cross bar 101, and the cross bar 1 can be extended by pulling the second cross bar 102 out of the first insertion hole 1011 for a distance. When the other first locating hole 1012 on the first cross bar 101 is aligned with the second locating hole 1021, the first locating pin 6 is reinserted into the first locating hole 1012 and the second locating hole 1021 at the same time, so that the length of the beam 1 is locked to prevent the length of the beam 1 from changing during transportation.

[0042] In some embodiments, the glass handling device further includes a first elastic member 7, a first chamber 1022 is provided in the second cross bar 102, the first elastic member 7 is provided in the first chamber 1022, one end of the first elastic member 7 is fixed to the inner wall of the second cross bar 102, a first positioning pin 6 is connected to the other end of the first elastic member 7, and the first elastic member 7 presses the first positioning pin 6 to insert into the second positioning hole 1021; when the second positioning hole 1021 coincides with the first positioning hole 1012, the first elastic member 7 presses the first positioning pin 6 to insert into the second positioning hole 1021 and the first positioning hole 1012 at the same time. When the first cross bar 101 and the second cross bar 102 are both hollow square tubes, the hollow structure inside the second cross bar 102 constitutes the aforementioned first chamber 1022. The first elastic member 7 can undergo elastic deformation, such as Figure 3 As shown, when the first positioning pin 6 is pressed toward the first chamber 1022, the first elastic member 7 is elastically deformed, and the outer end of the first positioning pin 6 is disengaged from the first positioning hole 1012. At this time, the second cross bar 102 can slide relative to the first cross bar 101, thereby realizing the extension and retraction of the beam 1; after the beam 1 is adjusted to a suitable length, the corresponding first positioning hole 1012 is made to coincide with the second positioning hole 1021. During this period, the elastic force of the first elastic member 7 will drive the first positioning pin 6 to be inserted into the first positioning hole 1012, thereby realizing the locking of the length of the beam 1.

[0043] In some embodiments, the first elastic member 7 is a U-shaped first elastic sheet, one end of which is fixedly connected to the inner wall of the second cross bar 102, and the other end of which is connected to the first positioning pin 6. Fig. 9 As shown, the first spring sheet is formed by bending a metal plate, and the bent portion of the first spring sheet has elastic deformation capability. When one end of the first spring sheet is fixed to the second cross bar 102, the other end of the first spring sheet is pressed against the inner wall of the second cross bar 102 under the action of elastic force. If a first positioning hole 1012 is aligned with a second positioning hole 1021, the first spring sheet will cause the first positioning pin 6 to be inserted into the first positioning hole 1012 and the second positioning hole 1021 at the same time; when the first positioning pin 6 is pressed toward the first chamber 1022, the first spring sheet is elastically deformed, and the first positioning pin 6 is moved out of the first positioning hole 1012.

[0044] In some embodiments, there are multiple longitudinal beams 2, and the first crossbars 101 on two crossbeams 1 are connected by a portion of the longitudinal beams 2, and the second crossbars 102 on two crossbeams 1 are connected by another portion of the longitudinal beams 2. Figure 1 As shown, there are four longitudinal beams 2, the first crossbars 101 on the two crossbeams 1 are connected by two longitudinal beams 2, and the second crossbars 102 on the two crossbeams 1 are connected by another two longitudinal beams 2. It should be particularly noted that the crossbeams 1 and the longitudinal beams 2 are perpendicular to each other, and the ends of the longitudinal beams 2 can be connected to the crossbeams 1 through angle brackets 10.

[0045] In some embodiments, the length of the longitudinal beam 2 is retractable, and the structure for retracting the longitudinal beam 2 can be the same as the mechanism for retracting the cross beam 1. By making the length of the longitudinal beam 2 retractable, the glass handling device can be adapted to glasses of different widths.

[0046] In some embodiments, the longitudinal beam 2 includes a first longitudinal rod 201 and a second longitudinal rod 202. The first longitudinal rod 201 is provided with a second insertion hole 2011. One end of the second longitudinal rod 202 is inserted into the second insertion hole 2011 and can slide in the second insertion hole 2011 along the length direction of the first longitudinal rod 201. The first longitudinal rod 201 and the second longitudinal rod 202 can also be hollow square tubes. In this case, the hollow structure inside the first longitudinal rod 201 constitutes the second insertion hole 2011.

[0047] In some embodiments, the glass handling device further comprises a second positioning pin 8, a plurality of third positioning holes 2012 communicating with the second insertion hole 2011 are provided on the first longitudinal rod 201, and the plurality of third positioning holes 2012 are equidistantly spaced along the length direction of the first longitudinal rod 201, a fourth positioning hole 2021 is provided on the second longitudinal rod 202, and the second positioning pin 8 can be inserted into the third positioning hole 2012 and the fourth positioning hole 2021 at the same time. When the second positioning pin 8 is inserted into the third positioning hole 2012 and the fourth positioning hole 2021 at the same time, the length of the longitudinal beam 2 is locked; when the second positioning pin 8 is pulled out of the third positioning hole 2012 and / or the fourth positioning hole 2021, the longitudinal beam 2 can be extended or shortened.

[0048] In some embodiments, the glass handling device also includes a U-shaped second spring clip 9, a second chamber 2022 is provided in the second longitudinal rod 202, the second spring clip 9 is provided in the second chamber 2022, one end of the second spring clip 9 is fixed to the inner wall of the second longitudinal rod 202, and the other end of the second spring clip 9 is connected to the second positioning pin 8, and the second spring clip 9 presses the second positioning pin 8 to insert into the fourth positioning hole 2021; when the fourth positioning hole 2021 coincides with the third positioning hole 2012, the second spring clip 9 presses the second positioning pin 8 to insert into the fourth positioning hole 2021 and the third positioning hole 2012 at the same time.

[0049] The glass handling device provided by the utility model is very suitable for handling large-sized glass, which can reduce the difficulty of handling large-sized glass, and has good safety during use, which can well prevent the glass from falling and injuring the operator. In addition, the glass handling device can be freely adjusted according to the size of the glass, thereby further improving the stability and safety during the handling process. When the glass handling device is not in use, the length of the crossbeam 1 and the longitudinal beam 2 can also be shortened to reduce the occupied area.

[0050] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0051] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A glass handling device, characterized in that: include: Two cross beams (1), the two cross beams (1) are parallel to each other, and the length of the cross beams (1) is retractable; A longitudinal beam (2), wherein the two transverse beams (1) are connected by the longitudinal beam (2); Suction cups (3), a plurality of the suction cups (3) being arranged on the crossbeam (1); a vacuum generator (4), which is arranged on the cross beam (1) and / or the longitudinal beam (2) and is connected to the suction cup (3) through an air pipe; and Handles (5), both ends of the crossbeam (1) are provided with handles (5).

2. The glass handling device according to claim 1, characterized in that: The crossbeam (1) comprises a first crossbar (101) and a second crossbar (102); the first crossbar (101) is provided with a first insertion hole (1011); one end of the second crossbar (102) is inserted into the first insertion hole (1011) and can slide in the first insertion hole (1011) along the length direction of the first crossbar (101); the first crossbar (101) and the second crossbar (102) are both provided with the suction cup (3) and the handle (5).

3. The glass handling device according to claim 2, characterized in that: The invention also comprises a first positioning pin (6), the first cross bar (101) is provided with a plurality of first positioning holes (1012) connected with the first insertion hole (1011), the plurality of first positioning holes (1012) are spaced apart along the length direction of the first cross bar (101), the second cross bar (102) is provided with a second positioning hole (1021), and the first positioning pin (6) can be inserted into the first positioning hole (1012) and the second positioning hole (1021) at the same time.

4. The glass handling device according to claim 3, characterized in that: It also includes a first elastic member (7), a first chamber (1022) is provided in the second cross bar (102), the first elastic member (7) is provided in the first chamber (1022), one end of the first elastic member (7) is fixed to the inner wall of the second cross bar (102), the first positioning pin (6) is connected to the other end of the first elastic member (7), and the first elastic member (7) presses the first positioning pin (6) to be inserted into the second positioning hole (1021); when the second positioning hole (1021) coincides with the first positioning hole (1012), the first elastic member (7) presses the first positioning pin (6) to be inserted into the second positioning hole (1021) and the first positioning hole (1012) at the same time.

5. The glass handling device according to claim 4, characterized in that: The first elastic member (7) is a U-shaped first elastic sheet, one end of which is fixedly connected to the inner wall of the second cross bar (102), and the other end of which is connected to the first positioning pin (6).

6. The glass handling device according to claim 2, characterized in that: The number of the longitudinal beams (2) is plural, the first cross bars (101) on the two cross beams (1) are connected via a portion of the longitudinal beam (2), and the second cross bars (102) on the two cross beams (1) are connected via another portion of the longitudinal beam (2).

7. The glass handling device according to any one of claims 1 to 6, characterized in that: The length of the longitudinal beam (2) is retractable.

8. The glass handling device according to claim 7, characterized in that: The longitudinal beam (2) comprises a first longitudinal rod (201) and a second longitudinal rod (202); the first longitudinal rod (201) is provided with a second insertion hole (2011); one end of the second longitudinal rod (202) is inserted into the second insertion hole (2011) and can slide in the second insertion hole (2011) along the length direction of the first longitudinal rod (201).

9. The glass handling device according to claim 8, characterized in that: The invention also comprises a second positioning pin (8), the first longitudinal rod (201) is provided with a plurality of third positioning holes (2012) connected with the second insertion hole (2011), the plurality of third positioning holes (2012) are spaced apart along the length direction of the first longitudinal rod (201), the second longitudinal rod (202) is provided with a fourth positioning hole (2021), and the second positioning pin (8) can be inserted into the third positioning hole (2012) and the fourth positioning hole (2021) at the same time.

10. The glass handling device according to claim 9, characterized in that: It also comprises a U-shaped second spring piece (9), a second chamber (2022) is provided in the second longitudinal rod (202), the second spring piece (9) is arranged in the second chamber (2022), one end of the second spring piece (9) is fixed to the inner wall of the second longitudinal rod (202), the other end of the second spring piece (9) is connected to the second positioning pin (8), the second spring piece (9) presses the second positioning pin (8) to be inserted into the fourth positioning hole (2021); when the fourth positioning hole (2021) coincides with the third positioning hole (2012), the second spring piece (9) presses the second positioning pin (8) to be inserted into the fourth positioning hole (2021) and the third positioning hole (2012) at the same time.

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