Self-locking adhesive gripper

Abstract

The application discloses a self-locking adhesive gripper, comprising a frame body, a pressing piece, an elastic supporting assembly, an adhesive assembly and a locking mechanism; the adhesive assembly comprises an adhesive pad and a connecting piece, the pressing piece makes the adhesive pad in a pulling state or a loosening state through the connecting piece; the locking mechanism comprises a first locking piece and a second locking piece, the first locking piece has a first matching position and a second matching position; when the second locking piece is in the first matching position, the adhesive pad is in the loosening state, and when the second locking piece is in the second matching position, the adhesive pad is in the pulling state; the pressing piece is pressed to make the second locking piece separate from the first matching position or the second matching position, the pressing of the pressing piece is removed, the pressing piece moves under the restoring force of the elastic supporting assembly, so that the second locking piece matches and is relatively fixed with the second matching position or the first matching position. The self-locking adhesive gripper provided by the application is convenient for adhesive clamping and conversion of the release state, improves stability, and is convenient for miniaturization.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of adhesion clamping devices, in particular to a self-locking adhesion gripper. BACKGROUND

[0002] In modern industrial processing, the demand for automation manufacturing is increasing rapidly. Robots have been widely used in factory workshops for production and manufacturing due to their unique advantages in industrial manufacturing. Simple, tedious and dangerous work can be handed over to robots or assisted by robots. In order to enable robots to complete the movement and assembly of objects in the work scene, robots must have grippers with grasping and releasing capabilities to achieve control of objects. The current robot gripper has been very maturely used in the production line of automated industrial production. However, grasping and releasing are easily affected by the nature of the grasped object, resulting in failure or damage to the grasping of flexible or hard thin objects. Therefore, in order to solve the problem of clamping light, thin, flexible or hard objects, the gripper needs to have the ability of small relative force, stable and non-damage clamping and releasing. Therefore, the adhesion gripper as a new type of clamping method has gradually attracted attention.

[0003] The function of the adhesion gripper is to complete clamping and releasing without damaging the surface of the object by adhering to the micron-level microstructure on the surface of the pad and using van der Waals force. It is especially suitable for non-damage clamping of light and thin objects. However, the existing adhesion gripper has poor stability when adhering and clamping the object, and it is difficult to realize miniaturization. SUMMARY

[0004] The purpose of the present application is to provide a self-locking adhesion gripper to solve the problems existing in the prior art, facilitate the conversion of adhesion clamping and release state, improve stability, and facilitate miniaturization.

[0005] To achieve the above purpose, the present application provides the following solutions:

[0006] The application provides a self-locking adhesive gripper, comprising a frame, a pressing piece, an elastic supporting assembly, an adhesive assembly and a locking mechanism; the pressing piece is movably connected to the frame; the elastic supporting assembly is supported between the pressing piece and the frame, and the pressing piece can move relative to the frame to enable the elastic supporting assembly to be elastically deformed; the adhesive assembly comprises an adhesive pad and a connecting piece, the adhesive pad is arranged on one side of the frame, and the connecting piece is connected to the pressing piece and the adhesive pad; the pressing piece moves relative to the frame to enable the adhesive pad to be in a pulling state or a loosening state through the connecting piece; the locking mechanism comprises a first locking piece and a second locking piece, the first locking piece is fixedly arranged on the pressing piece and can move synchronously with the pressing piece, and the second locking piece is arranged on the frame; the first locking piece has a first matching position and a second matching position which can be fixed relative to the second locking piece; when the second locking piece is at the first matching position, the adhesive pad is in the loosening state, and when the second locking piece is at the second matching position, the adhesive pad is in the pulling state; by pressing the pressing piece, the second locking piece is separated from the first matching position or the second matching position, and after the pressing on the pressing piece is removed, the pressing piece can move under the restoring force of the elastic supporting assembly to enable the second locking piece to match and be fixed relative to the second matching position or the first matching position.

[0007] Preferably, the pressing piece is arranged on the side of the frame away from the adhesive pad, and the pressing piece can slide relative to the frame in the direction of approaching or moving away from the adhesive pad.

[0008] Preferably, the first locking piece is arranged as a first locking plate, the side of the first locking plate facing the second locking piece has a limiting block, the limiting block has a plurality of locking grooves arranged in steps in the circumferential direction, and the side of the limiting block away from and close to the adhesive pad is the first matching position and the second matching position respectively; the second locking piece can be fixed at the first matching position under the support of the elastic supporting assembly; by pressing the pressing piece, the first locking piece can move in the direction of approaching or moving away from the adhesive pad to enable the second locking piece to be separated from the first matching position or the second matching position, and after the pressing on the pressing piece is removed, the first locking piece can move in the direction of moving away from the adhesive pad under the restoring force of the elastic supporting assembly to enable the second locking piece to match the second matching position or the first matching position along the plurality of locking grooves arranged in steps.

[0009] Preferably, the second locking member comprises a second locking plate and an elastic member, the frame body has a movable slot, a pin is arranged in the movable slot, one side of the second locking plate is arranged in the movable slot and can movably cover the pin, a limiting pin is arranged on the side of the second locking plate facing the first locking member, the limiting pin can cooperate with the first locking member, and the elastic member is arranged in the movable slot and connected to the second locking plate and the frame body, and the elastic member can support the limiting pin to tightly contact the first locking member.

[0010] Preferably, the elastic support assembly comprises a guide rod and an elastic support member, the guide rod is fixedly arranged on the frame body, the pressing member movably passes through the guide rod, and the elastic support member is arranged between the pressing member and the frame body.

[0011] Preferably, the connecting member is a connecting belt, and the two ends of the pressing member are fixedly connected to the adhesive pad through the connecting belt.

[0012] Preferably, the adhesive assembly further comprises an elastic pad arranged between the adhesive pad and the frame body.

[0013] Preferably, the frame body comprises a base and two vertical frames arranged on the two sides of the base, the pressing member, the elastic support assembly and the locking mechanism are arranged between the vertical frames, and the adhesive pad is arranged on the side of the base away from the pressing member.

[0014] Preferably, the pressing member is provided with sliding protrusions on the two sides opposite to the two vertical frames, the two vertical frames are provided with sliding grooves in the direction perpendicular to the adhesive pad, and the sliding protrusions are slidably connected in the sliding grooves.

[0015] Preferably, the base and the two vertical frames are detachably connected.

[0016] The present application has the following technical effects compared with the prior art:

[0017] The self-locking adhesive gripper provided by the application is characterized in that: the pressing piece is movably connected to the frame body, so that the pressing action on the locking mechanism is facilitated; the elastic supporting assembly is arranged between the pressing piece and the frame body, thereby saving the overall space and enabling the elastic restoring force of the elastic supporting assembly to drive the locking mechanism; the adhesive pad of the adhesive assembly is connected to the pressing piece through the connecting piece, the connecting piece can pull the adhesive pad to enable the adhesive pad to adhere to the object, and the adhesive pad is deformed and restored to release the object after the connecting piece removes the pulling force on the adhesive pad; the second locking piece is separated from the first matching position or the second matching position by pressing the pressing piece, and the pressing piece can move under the restoring force of the elastic supporting assembly after the pressing on the pressing piece is removed, so that the second locking piece can be matched with the second matching position or the first matching position and be relatively fixed; thus, the gripper provided by the application does not need to be provided with an additional driving source, and only the pressing action is needed to realize the stable adhesion or release of the object, facilitate the conversion between the adhesion and release states, and facilitate the miniaturization. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described below only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0019] Figure 1 The axial side schematic view of the self-locking adhesive gripper provided by the first embodiment is shown in the figure.

[0020] Figure 2 The front view schematic view of the self-locking adhesive gripper provided by the first embodiment is shown in the figure.

[0021] Figure 3 The exploded schematic view of the self-locking adhesive gripper provided by the first embodiment is shown in the figure.

[0022] Figure 4 The state schematic view of the second locking piece in the second matching position provided by the first embodiment is shown in the figure.

[0023] Figure 5 The axial side schematic view of the first locking piece provided by the first embodiment is shown in the figure.

[0024] Figure 6 The other axial side schematic view of the first locking piece provided by the first embodiment is shown in the figure.

[0025] In the figure: 1 - frame; 11 - movable slot; 12 - pin shaft; 13 - base; 14 - stand; 15 - sliding slot; 16 - bolt; 2 - pressing piece; 21 - sliding protrusion; 3 - elastic support assembly; 31 - guide rod; 32 - elastic support; 4 - adhesion assembly; 41 - adhesion pad; 42 - connecting piece; 43 - elastic pad; 5 - locking mechanism; 51 - first locking piece; 511 - first locking plate; 512 - limiting block; 513 - locking groove; 514 - stepped surface; 52 - second locking piece; 521 - second locking plate; 522 - elastic piece; 523 - limiting pin; 53 - first matching position; 54 - second matching position. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0027] The present application aims to provide a self-locking adhesion gripper to solve the problems existing in the prior art, facilitate the conversion of adhesion clamping and release state, improve stability, and facilitate miniaturization.

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0029] Embodiment one

[0030] The present embodiment provides a self-locking adhesion gripper, please see Figures 1-6, including a frame body 1, a pressing piece 2, an elastic supporting assembly 3, an adhering assembly 4 and a locking mechanism 5; the pressing piece 2 is movably connected to the frame body 1; the elastic supporting assembly 3 is supported between the pressing piece 2 and the frame body 1, and the pressing piece 2 can move relative to the frame body 1 so that the elastic supporting assembly 3 can be elastically deformed; the adhering assembly 4 comprises an adhering pad 41 and a connecting piece 42, the adhering pad 41 is arranged on one side of the frame body 1, and the connecting piece 42 is connected to the pressing piece 2 and the adhering pad 41; the pressing piece 2 moves relative to the frame body 1 so as to make the adhering pad 41 in a pulling state or a loosening state through the connecting piece 42; the locking mechanism 5 comprises a first locking piece 51 and a second locking piece 52, the first locking piece 51 is fixedly arranged on the pressing piece 2 and can move synchronously with the pressing piece 2, and the second locking piece 52 is arranged on the frame body 1; the first locking piece 51 has a first matching position 53 and a second matching position 54 which can be fixed relative to the second locking piece 52; when the second locking piece 52 is at the first matching position 53, the adhering pad 41 is in the loosening state, and when the second locking piece 52 is at the second matching position 54, the adhering pad 41 is in the pulling state.

[0031] The pressing piece 2 is movably connected to the frame body 1, which facilitates pressing action on the locking mechanism 5; the elastic supporting assembly 3 is arranged between the pressing piece 2 and the frame body 1, which saves overall space and can drive the locking mechanism 5 by using the elastic restoring force of the elastic supporting assembly 3; the adhering pad 41 of the adhering assembly 4 is connected to the pressing piece 2 through the connecting piece 42, the connecting piece 42 can pull the adhering pad 41 so as to adhere to an object, and after the connecting piece 42 removes the pulling on the adhering pad 41, the adhering pad 41 deforms and returns to release the object; by pressing the pressing piece 2, the second locking piece 52 is separated from the first matching position 53 or the second matching position 54, and correspondingly, after the pressing on the pressing piece 2 is removed, the pressing piece 2 can move under the restoring force of the elastic supporting assembly 3 so that the second locking piece 52 can match and be fixed relative to the second matching position 54 or the first matching position 53; thus, the gripper provided by the present application does not need to be provided with an additional driving source, and only needs pressing action to achieve stable adhesion or release of an object, which facilitates conversion between adhesion and release states and miniaturization.

[0032] In an optional solution of the embodiment, preferably, the pressing piece 2 is arranged on the side of the frame body 1 away from the adhering pad 41, and the pressing piece 2 can slide relative to the frame body 1 in the direction of approaching or moving away from the adhering pad 41, that is, the pressing piece 2 moves in the direction perpendicular to the adhering pad 41, and the elastic supporting assembly 3 converts the normal movement of the pressing piece 2 into driving of the structure of the adhering pad 41, thereby realizing the function of reciprocating and cyclic clamping and releasing of the adhesive gripper.

[0033] In an optional solution of the embodiment, preferably, please refer to Figure 5 and Figure 6, the first locking member 51 is provided as a first locking plate 511, and the side of the first locking plate 511 facing the second locking member 52 is provided with a limiting block 512, and the limiting block 512 is circumferentially provided with a plurality of locking grooves 513 arranged in steps, and the side of the limiting block 512 away from and close to the adhesive pad 41 is respectively provided as a first matching position 53 and a second matching position 54.

[0034] Specifically, in the orientation shown in Figure 5 and Figure 6 , the plurality of locking grooves 513 are arranged in steps along the clockwise direction, and the edges of adjacent locking grooves 513 are provided with stepped surfaces 514, and the stepped surfaces 514 are provided to guide and limit, so that the second locking member 52 is cyclically movable relative to the first locking member 51 in the clockwise direction; the limiting block 512 is provided in a heart shape, and the first matching position 53 is provided with an inner recessed fixing groove for fixing the second locking member 52, and the heart shape is provided to facilitate guiding the second locking member 52.

[0035] From the first matching position 53 to the second matching position 54, in the initial state, the supporting force of the elastic supporting assembly 3 is upward, and the second locking member 52 can be pressed on the first matching position 53 under the supporting action of the elastic supporting assembly 3, at this time the adhesive pad 41 is in a loose state, the pressing member 2 is pressed, the first locking member 51 can move in the direction close to the adhesive pad 41 to make the second locking member 52 disengage from the first matching position 53, after the pressing member 2 reaches the limit position, under the guidance of the stepped surface 514, the second locking member 52 is connected in the groove on the right upper side of the limiting block 512, after the pressing on the pressing member 2 is removed, the first locking member 51 can move away from the adhesive pad 41 under the restoring force of the elastic supporting assembly 3, so that the second locking member 52 cooperates with the plurality of locking grooves 513 arranged in steps to the second matching position 54, at this time the adhesive pad 41 is in an adhered state, the pressing member 2 moves to the limit position, under the restoring force of the elastic supporting assembly 3 and the limiting action of the connecting member 42, the second locking member 52 is stable at the second matching position 54, thereby realizing stable adhesion, as shown in Figure 4 .

[0036] From the second matching position 54 to the first matching position 53, the pressing member 2 is pressed, the first locking member 51 can move in the direction close to the adhesive pad 41 to make the second locking member 52 disengage from the second matching position 54, under the guidance of the stepped surface 514, the pressing member 2 reaches the limit position, that is, the second locking member 52 is connected in the groove on the left upper side of the limiting block 512, after the pressing on the pressing member 2 is removed, the first locking member 51 can move away from the adhesive pad 41 under the restoring force of the elastic supporting assembly 3, so that the second locking member 52 cooperates with the plurality of locking grooves 513 arranged in steps to the first matching position 53, thereby realizing the cycle.

[0037] In an optional embodiment of the present embodiment, more preferably, please refer toFigure 3 The second locking member 52 comprises a second locking plate 521 and an elastic member 522, the frame body 1 has a movable slot 11, a pin shaft 12 is arranged in the movable slot 11, the second locking plate 521 is arranged in the movable slot 11 and can be movably sleeved on the pin shaft 12, one side of the second locking plate 521 is provided with a limiting pin 523, the limiting pin 523 can cooperate with the first locking member 51, and the elastic member 522 is arranged in the movable slot 11 and connected to the second locking plate 521 and the frame body 1. The elastic member 522 can support the limiting pin 523 to be close to the first locking member 51. Specifically, the lower circumferential side of the second locking plate 521 is provided as an arc surface, so as to rotate around the pin shaft 12 in the movable slot 11, so as to meet the circumferential rotation requirement of the limiting pin 523 around the limiting block 512. The elastic member 522 is provided as a spring and arranged on the side of the second locking plate 521 away from the first locking member 51, so as to continuously push the second locking plate 521, so that the limiting pin 523 is always close to the first locking member 51 in different locking grooves 513, and is prevented from being separated from the guiding and limiting of the corresponding stepped surface 514.

[0038] In an optional solution of the embodiment, preferably, the elastic supporting assembly 3 comprises a guide rod 31 and an elastic supporting member 32, the guide rod 31 is fixedly arranged on the frame body 1, the pressing member 2 is movably arranged on the guide rod 31, and the elastic supporting member 32 is arranged between the pressing member 2 and the frame body 1. Specifically, the guide rod 31 and the elastic supporting member 32 are arranged in two groups to improve stability, and the elastic supporting member 32 is provided as a spring.

[0039] In an optional solution of the embodiment, preferably, the connecting member 42 is provided as a connecting belt, and the two ends of the pressing member 2 are fixedly connected to the adhesive pad 41 through the connecting member 42. Specifically, the connecting belt can be provided as a polyimide adhesive tape, and the end of the connecting belt can be provided with a pressing buckle. The pressing member 2 is provided with a pressing groove matched with the pressing buckle, so as to be detachably fixed, or directly fixed by using other ways such as a screw. The adhesive pad 41 adopts a conventional structure, and has a micron-level wedge-shaped microstructure on the lower surface. When the connecting belt is stretched to the adhesive pad 41, the microstructure on the adhesive pad 41 is deformed, the contact area with the surface of the object is increased, a significant van der Waals force is generated, and the object is in an adhesive state. When the stretching to the adhesive pad 41 is removed, the deformation of the adhesive pad 41 under the action is restored, no significant van der Waals force is generated with the surface of the object, and the object is in a loose state.

[0040] In an optional solution of the embodiment, preferably, please refer to Figure 2 The adhesive assembly 4 further comprises an elastic pad 43 arranged between the adhesive pad 41 and the frame body 1. The elastic pad 43 is connected to the adhesive pad 41. When the stretching to the adhesive pad 41 is removed, the adhesive pad 41 can be deformed and restored under the action of the elastic pad 43, the microstructure on the lower surface of the adhesive pad 41 does not generate a significant van der Waals force with the surface of the object, and the object is in a loose state.

[0041] In an optional solution of the embodiment, preferably, the frame body 1 comprises a base 13 and two stands 14 arranged side by side on both sides of the base 13, the pressing piece 2, the elastic supporting assembly 3 and the locking mechanism 5 are arranged between the stands 14, space is saved, and miniaturization is facilitated; the adhesive pad 41 is arranged on the side of the base 13 away from the pressing piece 2, and the object is facilitated to be adhered.

[0042] In an optional solution of the embodiment, preferably, the pressing piece 2 is provided with sliding protrusions 21 on the two sides opposite to the two stands 14, the two stands 14 are provided with sliding grooves 15 in the direction perpendicular to the adhesive pad 41, and the sliding protrusions 21 are slidingly connected in the sliding grooves 15; through the cooperation of the sliding protrusions 21 and the sliding grooves 15, sliding and limiting are realized.

[0043] In an optional solution of the embodiment, preferably, the base 13 and the two stands 14 are detachably connected, and specifically, the detachable connection can be realized through the bolts 16.

[0044] The principles and implementation manners of the present application are described by using specific examples in the present application; the above embodiment is only used for helping to understand the method of the present application and the core idea thereof; meanwhile, for the person skilled in the art, according to the idea of the present application, the specific implementation manner and application range will be changed. In conclusion, the content of the present specification should not be understood as the limitation of the present application.

Claims

1. A self-locking adhesive gripper, characterized by: The utility model relates to a kind of adhesive pad, including: Frame (1); Pressing piece (2), movably connected to the frame (1); Elastic support assembly (3) is supported between the pressing piece (2) and the frame (1), and the pressing piece (2) can be moved relative to the frame (1) to enable the elastic support assembly (3) to be elastically deformed; Adhesion assembly (4), including adhesive pad (41) and connecting piece (42), the adhesive pad (41) is arranged on one side of the frame (1), the connecting piece (42) is connected to the pressing piece (2) and the adhesive pad (41), the pressing piece (2) is opposite to the frame (1) and moves to enable the adhesive pad (41) to be in tension state or loose state by the connecting piece (42);And Locking mechanism (5), including first locking piece (51) and second locking piece (52), the first locking piece (51) is fixedly arranged on the pressing piece (2) and can be moved synchronously with the pressing piece (2), and the second locking piece (52) is arranged on the frame (1);The first locking piece (51) has the first cooperation position (53) and the second cooperation position (54) that can be opposite to the second locking piece (52) fixedly;When the second locking piece (52) is in the first cooperation position (53), the adhesive pad (41) is in loose state, and when the second locking piece (52) is in the second cooperation position (54), the adhesive pad (41) is in tension state; By pressing the pressing piece (2), the second locking piece (52) is separated from the first cooperation position (53) or the second cooperation position (54), and after removing the pressing of the pressing piece (2), the pressing piece (2) can move under the restoring force of the elastic support assembly (3) to enable the second locking piece (52) to cooperate with the second cooperation position (54) or the first cooperation position (53) and be opposite to fixed.

2. The self-locking adhesive gripper of claim 1, wherein: The pressing piece (2) is arranged on the side of the frame (1) away from the adhesive pad (41), and the pressing piece (2) can slide relative to the frame (1) in the direction close to or away from the adhesive pad (41).

3. The self-locking adhesive gripper of claim 2, wherein: The first locking piece (51) is arranged as a first locking plate (511), and the side of the first locking plate (511) facing the second locking piece (52) has a limiting block (512) with a plurality of locking grooves (513) arranged in steps in the circumferential direction, and the side of the limiting block (512) away from and close to the adhesive pad (41) is the first cooperation position (53) and the second cooperation position (54) respectively;The second locking piece (52) can be fixed in the first cooperation position (53) under the support of the elastic support assembly (3). The first locking piece (51) can move along the direction close to or away from the adhesive pad (41) to make the second locking piece (52) disengage from the first matching position (53) or the second matching position (54), and after the pressing of the pressing piece (2) is removed, the first locking piece (51) can move along the direction away from the adhesive pad (41) under the restoring force of the elastic supporting assembly (3) to make the second locking piece (52) match to the second matching position (54) or the first matching position (53) along the multiple locking grooves (513) arranged in steps.

4. The self-locking adhesive gripper of claim 3, wherein: The second locking piece (52) comprises a second locking plate (521) and an elastic piece (522), the frame body (1) has a movable groove (11) therein, a pin shaft (12) is arranged in the movable groove (11), one side of the second locking plate (521) is arranged in the movable groove (11) and can be movably sleeved outside the pin shaft (12); a limiting pin (523) is arranged on the side of the second locking plate (521) facing the first locking piece (51); the limiting pin (523) can match with the first locking piece (51); the elastic piece (522) is arranged in the movable groove (11) and connected to the second locking plate (521) and the frame body (1), and the elastic piece (522) can support the limiting pin (523) to be close to the first locking piece (51).

5. The self-locking adhesive gripper of claim 2, wherein: The elastic supporting assembly (3) comprises a guide rod (31) and an elastic supporting piece (32), the guide rod (31) is fixedly arranged on the frame body (1), the pressing piece (2) is movably arranged in the guide rod (31), and the elastic supporting piece (32) is arranged between the pressing piece (2) and the frame body (1).

6. The self-locking adhesive gripper of claim 1, wherein: The connecting piece (42) is arranged as a connecting belt, and the pressing piece (2) is fixedly connected to the adhesive pad (41) through the connecting piece (42) at both ends.

7. The self-locking adhesive gripper of claim 1, wherein: The adhesive assembly (4) further comprises an elastic pad (43) arranged between the adhesive pad (41) and the frame body (1).

8. The self-locking adhesive gripper of claim 2, wherein: The frame body (1) comprises a base (13) and two vertical frames (14) arranged side by side on both sides of the base (13), the pressing piece (2), the elastic supporting assembly (3) and the locking mechanism (5) are arranged between the vertical frames (14), and the adhesive pad (41) is arranged on the side of the base (13) away from the pressing piece (2).

9. The self-locking adhesive gripper of claim 8, wherein: The pressing piece (2) is provided with sliding protrusions (21) on the opposite sides of the two vertical frames (14), and the vertical frames (14) are provided with sliding grooves (15) in the direction perpendicular to the adhesive pad (41), and the sliding protrusions (21) are slidingly connected in the sliding grooves (15).

10. The self-locking adhesive gripper of claim 8, wherein: The base (13) and the two vertical frames (14) can be detachably connected.

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