Fixing device for engineering safety monitoring sensor

Abstract

The invention discloses a fixing device for an engineering safety monitoring sensor, and relates to the technical field of sensor installation, and the fixing device comprises a main body unit which comprises a sensor body and a bottom plate arranged at the bottom of the sensor body; and the mounting unit comprises a fixed frame arranged below the bottom plate, two rotating assemblies arranged in the fixed frame, two connecting assemblies arranged on the bottom plate and matched with the rotating assemblies, a partition plate arranged in the fixed frame, and movable assemblies arranged on the partition plate and connected with the rotating assemblies. According to the fixing device for the engineering safety monitoring sensor, a screw rod is rotated to drive structures such as a rotating plate, a right-angle plate and a tooth plate to move and drive structures such as a gear, a rotating shaft and a rotating disc to rotate, so that a sliding plate extends out of a cross plate to fix a fixing frame, and a sensor body can be mounted on a fixing frame, so that the operation is simple, and the practicability is high. The use is convenient, and the subsequent maintenance treatment of monitoring personnel is also facilitated.

Description

Technical Field

[0001] This invention relates to the field of sensor installation technology, and in particular to a fixing device for engineering safety monitoring sensors. Background Technology

[0002] To ensure the safe construction and operation of engineering projects such as dams, geotechnical engineering, and bridges, a large number of sensors need to be installed and buried during the construction period for safety monitoring. In addition to collecting the physical quantity data generated by the sensors themselves, the monitoring personnel also need to record the fixed attribute information that identifies the sensors, such as the model number, factory number, and design number, so as to achieve a one-to-one match between the buried sensors and the corresponding sensor measurements.

[0003] Since sensors in actual engineering projects are mostly embedded in concrete or installed in hard-to-reach locations, and important information such as sensor model and serial number is usually identified by physical labels or engraving on the sensor surface, directly burying the sensors would prevent monitoring personnel from directly reading the sensor's attribute information, making them inconvenient to use. Furthermore, the information on the sensors is easily corroded, worn, or obstructed by external environmental factors, which would also make it difficult for monitoring personnel to accurately read the information. Therefore, improvements are needed. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the fixed devices for engineering safety monitoring sensors, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a fixing device for engineering safety monitoring sensors. The purpose is to change the traditional buried installation method of sensors, and to directly fix them to the outside of the location where they need to be installed. At the same time, the sensors are protected, which facilitates the maintenance of the sensors and the reading of information on the sensors by the monitoring personnel.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a main body unit, including a sensor body, and a base plate disposed at the bottom of the sensor body; and...

[0008] The mounting unit includes a fixed frame disposed below the base plate, two rotating components disposed inside the fixed frame, two connecting components disposed on the base plate and cooperating with the rotating components, a partition disposed inside the fixed frame, a movable component disposed on the partition and connected to the rotating components, and a threaded component disposed on the partition and connected to the movable components.

[0009] The protective unit includes a protective component disposed on the fixed frame and cooperating with the sensor body, and a limiting component disposed on the fixed frame and cooperating with the protective component.

[0010] As a preferred embodiment of the fixing device for engineering safety monitoring sensors described in this invention, the rotating assembly includes a cross plate disposed inside the fixing frame, a rotating shaft disposed on the cross plate, and a turntable disposed on the rotating shaft and located below the cross plate. The turntable is provided with an arc-shaped groove, the cross plate is provided with a sliding groove, the cross plate is provided with a sliding plate adapted to the sliding groove, and the sliding plate is provided with a connecting rod that cooperates with the arc-shaped groove.

[0011] As a preferred embodiment of the fixing device for engineering safety monitoring sensors according to the present invention, the connecting component includes a fixing frame disposed on the base plate, a positioning port disposed on the fixing frame and adapted to the fixing frame, and a fixing port disposed on the fixing frame and adapted to the sliding plate.

[0012] As a preferred embodiment of the fixing device for engineering safety monitoring sensors described in this invention, the movable component includes a gear disposed on the rotating shaft, two movable slots disposed on the partition plate, a toothed plate disposed on the movable slots and meshing with the gear, and a right-angle plate disposed on the movable slots and connected to the toothed pressure plate.

[0013] As a preferred embodiment of the fixing device for engineering safety monitoring sensors described in this invention, the threaded assembly includes a screw rod disposed on the partition plate, a threaded plate disposed on the screw rod, and a rotating plate disposed on the threaded plate and connected to the right-angle plate.

[0014] As a preferred embodiment of the fixing device for engineering safety monitoring sensors described in this invention, the protective component includes two fixing rods disposed inside the fixing frame, a protective frame disposed on the fixing rods, and a tension spring disposed on the fixing rods and connected to the protective frame.

[0015] As a preferred embodiment of the fixing device for engineering safety monitoring sensors described in this invention, the protective component further includes a slot disposed on the base plate and cooperating with the protective frame, and a horizontal groove disposed on the fixing frame and cooperating with the protective frame, the horizontal groove being located directly below the slot.

[0016] As a preferred embodiment of the fixing device for engineering safety monitoring sensors described in this invention, the limiting component includes two movable slots disposed on the fixing frame, a movable frame disposed in the movable slots, and an inclined plate disposed on the movable frame and cooperating with the right-angle plate. The protective frame is provided with a limiting slot, and the movable frame is provided with a limiting protrusion that cooperates with the limiting slot.

[0017] As a preferred embodiment of the fixing device for engineering safety monitoring sensors described in this invention, the limiting component further includes an upright plate disposed on the fixing frame, a limiting rod disposed on the upright plate and connected to the movable frame, and a connecting spring disposed between the upright plate and the movable frame.

[0018] In a preferred embodiment of the fixing device for engineering safety monitoring sensors described in this invention, the sides of the inclined plate and the right-angle plate opposite to each other are both set as inclined surfaces.

[0019] The beneficial effects of this invention are:

[0020] 1. By rotating the screw, the rotating plate, right-angle plate, toothed plate and other structures are moved, which drives the gear, rotating shaft, turntable and other structures to rotate, so that the slide plate extends out of the cross plate to fix the fixed frame, and the sensor body can be installed on the fixed frame. It is not only simple to operate and easy to use, but also convenient for subsequent maintenance by monitoring personnel.

[0021] 2. When the screw rotates and drives the right-angle plate and other structures to a certain position, the right-angle plate will squeeze the inclined plate, causing the moving frame and the limiting protrusion to disengage from the limiting groove on the protective frame. As a result, the protective frames on both sides will be affected by the elastic force of the tension spring and move closer together and close together, forming a complete and sealed protective frame around the sensor body. This enhances the protection of the sensor body and prevents the information on its surface from being worn away by external environmental factors, thus preventing monitoring personnel from accurately reading the information on its surface. It has strong practicality. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0025] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0026] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0027] Figure 5 This is a schematic diagram of the structure of the protective component of the present invention.

[0028] Figure 6 This is a schematic diagram of the structure of the rotating component and the movable component of the present invention.

[0029] Figure 7 This is a schematic diagram of the structure of the connecting component of the present invention.

[0030] Figure 8 This is a schematic diagram of the rotating component of the present invention.

[0031] Figure 9 This is a schematic diagram of the structure of the active component of the present invention.

[0032] Figure 10 This is a schematic diagram of the limiting component of the present invention. Detailed Implementation

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0036] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0037] Example 1, referring to Figures 1-4 This first embodiment of the invention provides a fixing device for an engineering safety monitoring sensor. The device includes a main unit 100, comprising a sensor body 101 and a base plate 102 disposed at the bottom of the sensor body 101; and an mounting unit 200, comprising a fixing frame 201 disposed below the base plate 102, two rotating components 202 disposed inside the fixing frame 201, two connecting components 203 disposed on the base plate 102 and cooperating with the rotating components 202, a partition 204 disposed inside the fixing frame 201, a movable component 205 disposed on the partition 204 and connected to the rotating components 202, and a threaded component 206 disposed on the partition 204 and connected to the movable component 205; and a protection unit 300, comprising a protection component 301 disposed on the fixing frame 201 and cooperating with the sensor body 101, and a limiting component 302 disposed on the fixing frame 201 and cooperating with the protection component 301.

[0038] The bottom of the sensor body 101 is fixedly connected to the top of the base plate 102, and the base plate 102 is tightly fitted with the fixing frame 201. The fixing frame 201 can be installed in the required position using bolts or other tools.

[0039] In use, the base plate 102 and the sensor body 101 are aligned and attached to the fixed frame 201. Then, the rotating component 202 drives the movable component 205 and the rotating component 202 to make corresponding adjustments, so that the connecting component 203 fixes the fixed component, thereby fixing the sensor body 101 to the fixed frame 201. After the sensor body 101 is fixedly installed, the movable component 205 will squeeze and drive the limiting component 302 to move, so that the limiting component 302 will disengage from the limiting of the protective frame 301b, thereby allowing the two protective frames 301b to automatically close under elastic force to form protection.

[0040] Example 2, refer to Figures 1-9This is a second embodiment of the present invention, which differs from the first embodiment in that: the rotating assembly 202 includes a cross plate 202a disposed inside the fixed frame 201, a rotating shaft 202b disposed on the cross plate 202a, and a turntable 202c disposed on the rotating shaft 202b and located below the cross plate 202a. The turntable 202c is provided with an arc-shaped groove 202d. The cross plate 202a is provided with a sliding groove 202e. A sliding plate 202f adapted to the sliding groove 202e is disposed inside the cross plate 202a. A connecting rod 202g cooperating with the arc-shaped groove 202d is disposed on the sliding plate 202f. The cross plate... The top of 202a is fixedly connected to the top of the inner cavity of the fixed frame 201 via a fixing block. The top of the rotating shaft 202b is rotatably connected to the bottom of the cross plate 202a via a bearing. The bottom of the rotating shaft 202b is rotatably connected to the bottom of the inner cavity of the fixed frame 201 via a bearing. The turntable 202c is sleeved and fixedly connected to the outer surface of the rotating shaft 202b. The turntable 202c has four arc-shaped grooves 202d, and the arc-shaped grooves 202d on the two sets of turntables 202c are arranged in opposite directions. The sliding grooves 202e are respectively opened in the four directions of the cross plate 202a. The sliding plate 202f is slidably connected to the sliding groove 202e. The connecting rod 202g is fixedly connected to the sliding plate 202f.

[0041] Furthermore, the connecting component 203 includes a fixing frame 203a disposed on the base plate 102, a positioning port 203b disposed on the fixing frame 201 and adapted to the fixing frame 203a, and a fixing port 203c disposed on the fixing frame 203a and adapted to the sliding plate 202f; wherein, the fixing frame 203a is composed of four vertical plates in different directions, and the four vertical plates correspond to the four directions of the cross plate 202a respectively; the positioning port 203b is slidably connected to the fixing frame 203a, and the fixing port 203c is slidably connected to the sliding plate 202f;

[0042] When the turntable 202c and the rotating shaft 202b rotate, they will drive the connecting rod 202g to move accordingly following the arc groove 202d. This will cause the slide plate 202f to slide in the cross plate 202a and extend into the fixing port 203c on the fixing frame 203a, thereby fixing the sensor body 101, the base plate 102 and the fixing frame 201 together. Since the arc grooves 202d on the two turntables 202c are set opposite to each other, when the threaded assembly 206 and the movable assembly 205 drive the rotating shaft 202b and the turntable 202c to rotate, the two turntables 202c rotate in opposite directions. The oppositely set arc grooves 202d can make the turntables 202c with opposite rotation directions have the same movement state. This allows the two turntables 202c to drive the slide plate 202f on the two cross plates 202a to extend or retract synchronously when they rotate, which is convenient for installation and disassembly.

[0043] Furthermore, the movable component 205 includes a gear 205a disposed on the rotating shaft 202b, two movable slots 205b disposed on the partition plate 204, a toothed plate 205c disposed on the movable slots 205b and meshing with the gear 205a, and a right-angle plate 205d disposed on the movable slots 205b and connected to the toothed plate; wherein, the gear 205a is sleeved and fixedly connected to the outer surface of the rotating shaft 202b, and the gear 205a is located below the turntable 202c, the two movable slots 205b are respectively opened on both sides of the front side of the partition plate 204, and a slider is slidably connected inside the movable slots 205b, the front and rear sides of the slider being fixedly connected to the right-angle plate 205d and the toothed plate 205c respectively.

[0044] Furthermore, the threaded assembly 206 includes a screw 206a disposed on the partition 204, a threaded plate 206b disposed on the screw 206a, and a rotating plate 206c disposed on the threaded plate 206b and connected to the right-angle plate 205d; wherein, the back of the screw 206a is rotatably connected to the front of the partition 204 via a bearing, the front of the screw 206a passes through the fixing frame 201 and is fixedly connected to a handle, the screw 206a and the threaded plate 206b are threadedly connected, and both sides of the rotating plate 206c are rotatably connected to the threaded plate 206b and the right-angle plate 205d respectively via rotating blocks.

[0045] In use, first, the fixing bracket 203a is passed through the positioning port 203b, so that the base plate 102 is attached to the fixing frame 201. Then, the screw 206a is rotated to drive the threaded plate 206b to move closer to the partition plate 204, which in turn drives the rotating plate 206c to rotate, pushing the right angle plate 205d and the toothed plate 205c to move in the movable groove 205b, so that the right angle plate 205d and the toothed plate 205c on both sides move in opposite directions. The reverse movement of the two toothed plates 205c will drive the two gears 205a, the rotating shaft 202b, and the turntable 202c to rotate in opposite directions, thereby using the arc groove 202d to drive the connecting rod 202g to move, so that the sliding plate 202f in the two cross plates 202a gradually extends and completely enters the fixing port 203c on the fixing bracket 203a, thus completing the fixed installation of the sensor body 101.

[0046] The remaining structure is the same as that in Example 1.

[0047] Example 3, referring to Figures 1-10This is the third embodiment of the present invention, which differs from the second embodiment in that: the protective component 301 includes two fixed rods 301a disposed inside the fixed frame 201, a protective frame 301b disposed on the fixed rods 301a, and a tension spring 301c disposed on the fixed rods 301a and connected to the protective frame 301b; wherein, the two ends of the fixed rods 301a are respectively fixedly connected to the inner wall of the fixed frame 201, and the two fixed rods 301a are respectively located on the front and rear sides inside the fixed frame 201, and the protective frame 301b and the fixed rods 301a are slidably connected.

[0048] Furthermore, the protective component 301 also includes a slot 301d disposed on the base plate 102 and cooperating with the protective frame 301b, and a transverse groove 301e disposed on the fixing frame 201 and cooperating with the protective frame 301b, wherein the transverse groove 301e is located directly below the slot 301d; wherein, the number of slots 301d and transverse grooves 301e is four, and the positions of slots 301d and transverse grooves 301e are corresponding, and the fixing rod 301a is located directly below the transverse groove 301e.

[0049] Furthermore, the limiting component 302 includes two movable slots 302a disposed on the fixed frame 201, a movable frame 302b disposed in the movable slots 302a, and an inclined plate 302c disposed on the movable frame 302b and cooperating with the right angle plate 205d. The protective frame 301b is provided with a limiting slot 302d, and the movable frame 302b is provided with a limiting protrusion 302e cooperating with the limiting slot 302d. The movable slots 302a and the movable frame 302b are slidably connected. The bottom of the movable frame 302b is fixedly connected to the top of the inclined plate 302c. The limiting protrusion 302e is slidably connected to the limiting slot 302d. The front of the limiting slot 302d is open, thereby facilitating the entry and exit of the movable frame 302b and the limiting protrusion 302e.

[0050] Furthermore, the limiting component 302 also includes a vertical plate 302f disposed on the fixed frame 201, a limiting rod 302f-1 disposed on the vertical plate 302f and connected to the movable frame 302b, and a connecting spring 302f-2 disposed between the vertical plate 302f and the movable frame 302b; wherein, the bottom of the vertical plate 302f is fixedly connected to the top of the fixed frame 201, the vertical plate 302f is located on the front of the base plate 102, and the movable frame 302b and the limiting rod 302f-1 are slidably connected.

[0051] Furthermore, the inclined plate 302c and the right-angle plate 205d are both set as inclined surfaces on the opposite side; wherein, by setting the inclined surfaces, the right-angle plate 205d can better squeeze and push the inclined plate 302c to move when it is close to the inclined plate 302c.

[0052] In use, as the two right-angle plates 205d move in opposite directions and move away from each other, the right-angle plates 205d will gradually approach the inclined plate 302c. When the sensor body 101, the base plate 102, and the fixed frame 201 are fixedly connected together, the right-angle plates 205d will squeeze the inclined plate 302c to move away from the partition plate 204. This will cause the moving frame 302b and the limiting protrusion 302e to slide and disengage from the limiting groove 302d, so that the protective frame 301b is not restricted by the limiting protrusion 302e and the moving frame 302b. At this time, the two protective frames 301b will be brought closer to each other by the elastic force of the tension spring 301c until they close together, thus forming a complete and sealed protective frame 301b on the outer periphery of the sensor body 101.

[0053] The remaining structure is the same as that in Example 2.

[0054] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0055] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A fixing device for engineering safety monitoring sensors, characterized in that: include, The main unit (100) includes a sensor body (101) and a base plate (102) disposed at the bottom of the sensor body (101); and, The mounting unit (200) includes a fixed frame (201) disposed below the base plate (102), two rotating components (202) disposed inside the fixed frame (201), two connecting components (203) disposed on the base plate (102) and cooperating with the rotating components (202), a partition (204) disposed inside the fixed frame (201), a movable component (205) disposed on the partition (204) and connected to the rotating components (202), and a threaded component (206) disposed on the partition (204) and connected to the movable component (205). The protective unit (300) includes a protective component (301) disposed on the fixed frame (201) and cooperating with the sensor body (101), and a limiting component (302) disposed on the fixed frame (201) and cooperating with the protective component (301).

2. The fixing device for engineering safety monitoring sensors according to claim 1, characterized in that: The rotating assembly (202) includes a cross plate (202a) disposed inside the fixed frame (201), a rotating shaft (202b) disposed on the cross plate (202a), and a turntable (202c) disposed on the rotating shaft (202b) and located below the cross plate (202a). The turntable (202c) is provided with an arc groove (202d), the cross plate (202a) is provided with a sliding groove (202e), the cross plate (202a) is provided with a sliding plate (202f) adapted to the sliding groove (202e), and the sliding plate (202f) is provided with a connecting rod (202g) that cooperates with the arc groove (202d).

3. The fixing device for engineering safety monitoring sensors according to claim 2, characterized in that: The connecting assembly (203) includes a fixing bracket (203a) disposed on the base plate (102), a positioning port (203b) disposed on the fixing frame (201) and adapted to the fixing bracket (203a), and a fixing port (203c) disposed on the fixing bracket (203a) and adapted to the sliding plate (202f).

4. The fixing device for engineering safety monitoring sensors according to claim 3, characterized in that: The movable component (205) includes a gear (205a) disposed on the rotating shaft (202b), two movable slots (205b) disposed on the partition plate (204), a toothed plate (205c) disposed on the movable slots (205b) and meshing with the gear (205a), and a right-angle plate (205d) disposed on the movable slots (205b) and connected to the tooth pressure plate.

5. The fixing device for engineering safety monitoring sensors according to claim 4, characterized in that: The threaded assembly (206) includes a screw (206a) disposed on the partition plate (204), a threaded plate (206b) disposed on the screw (206a), and a rotating plate (206c) disposed on the threaded plate (206b) and connected to the right-angle plate (205d).

6. The fixing device for engineering safety monitoring sensors according to claim 5, characterized in that: The protective assembly (301) includes two fixed rods (301a) disposed inside the fixed frame (201), a protective frame (301b) disposed on the fixed rods (301a), and a tension spring (301c) disposed on the fixed rods (301a) and connected to the protective frame (301b).

7. The fixing device for engineering safety monitoring sensors according to claim 5 or 6, characterized in that: The protective component (301) further includes a slot (301d) disposed on the base plate (102) and cooperating with the protective frame (301b), and a transverse groove (301e) disposed on the fixed frame (201) and cooperating with the protective frame (301b), the transverse groove (301e) being located directly below the slot (301d).

8. The fixing device for engineering safety monitoring sensors according to claim 7, characterized in that: The limiting component (302) includes two movable slots (302a) disposed on the fixed frame (201), a movable frame (302b) disposed in the movable slots (302a), and an inclined plate (302c) disposed on the movable frame (302b) and cooperating with the right angle plate (205d). The protective frame (301b) is provided with a limiting slot (302d), and the movable frame (302b) is provided with a limiting protrusion (302e) cooperating with the limiting slot (302d).

9. The fixing device for engineering safety monitoring sensors according to claim 8, characterized in that: The limiting component (302) further includes a vertical plate (302f) disposed on the fixed frame (201), a limiting rod (302f-1) disposed on the vertical plate (302f) and connected to the movable frame (302b), and a connecting spring (302f-2) disposed between the vertical plate (302f) and the movable frame (302b).

10. The fixing device for engineering safety monitoring sensors according to claim 8 or 9, characterized in that: The inclined plate (302c) and the right-angle plate (205d) are both set as inclined surfaces on the opposite side.

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