Anti-drop wire duct for water and electricity open installation

Abstract

The invention relates to the technical field of water and electricity circuit decoration, and discloses a water and electricity surface-mounted anti-drop wire duct which comprises a box body, a cover body is connected to the top of the box body in a combined mode, a plurality of inner supporting assemblies are arranged in the box body, downward auxiliary hooks are arranged on the two sides of the bottom end of the cover body, a plurality of external expansion mechanisms are arranged at the bottom of the cover body, and each inner supporting assembly comprises a bottom plate. L-shaped side plates are arranged on the two sides of the bottom plate correspondingly, the two L-shaped side plates penetrate through the box body and are fixedly connected with the two side walls of the box body correspondingly, and main hooks which are matched with the auxiliary hooks and face upwards are arranged on the tops of the two L-shaped side plates correspondingly; structural support is provided for the box body and the cover body through the inner supporting assembly, the strength of the whole structure is ensured, a semi-open combined connection relation is formed through the auxiliary hooks on the cover body and the main hooks on the inner supporting assembly, and when the cover body is subjected to external pressure, the auxiliary hooks and the main hooks can form a staggered disconnection effect; and damage to joints caused by confrontation between the connecting structure and external force is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of water and electricity line decoration, and more specifically to an anti-slip wire trough for exposed water and electricity installation. Background Art

[0002] The exposed water and electricity cable duct is installed on the ground or wall indoors or outdoors. It is mainly used to accommodate and protect wires and cables or water pipes, while making them easier to maintain and manage. The water and electricity cable duct can arrange the wires and water pipes neatly on the wall or ground, making the indoor environment more tidy and beautiful. It also provides physical protection for the water and electricity lines, prevents moisture corrosion, and prevents interference. It is mainly composed of two parts: a box body and a cover body. The box body is fixed to the wall with nails or glue, and the lines are routed inside the box body. The cover body is assembled and connected to the box body, which is convenient for disassembly during later maintenance and repair of the water and electricity lines.

[0003] However, the existing wire duct still has defects. The structural firmness of the cover and the box body is relatively weak. When impacted by external force, the buckle used to connect the cover and the box body is easily deformed and damaged by the force, thereby causing the cover to fall off. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a water and electricity exposed anti-falling cable duct to solve the problem that the traditional cable duct in the above-mentioned background technology is easily damaged and falls off when affected by external forces.

[0005] The present invention provides the following technical solution: a water and electricity exposed anti-slip cable trough, comprising a box body, a cover body is assembled and connected to the top of the box body, a plurality of inner support components are arranged inside the box body, both sides of the bottom end of the cover body are provided with auxiliary hooks facing downward, and a plurality of outward expansion mechanisms are arranged at the bottom of the cover body, and the outward expansion mechanisms expand outward to form a supporting force on both sides of the inner wall of the box body to prevent the box body from slipping; The inner support assembly includes a bottom plate, L-shaped side plates are arranged on both sides of the bottom plate, the two L-shaped side plates penetrate the box body and are respectively fixedly connected to the two side walls of the box body, the tops of the two L-shaped side plates are respectively provided with main hooks that fit with the auxiliary hooks and face upwards, and the top of the bottom plate is fixedly connected to the middle plate; The middle plate is used to support the cover body, to separate the internal space of the box body, and to cooperate with the outward expansion mechanism to control the outward expansion of the outward expansion mechanism.

[0006] Furthermore, solid corner blocks are provided on both sides of the inner wall of the cover, and the two solid corner blocks are respectively located at the top of the two main hooks. When the cover body is forced to move downward, the top of the inner wall of the cover body will form a compressive force on the top edge of the box body.

[0007] Furthermore, the outward expansion mechanism is composed of two sliding parts, and there is a gap between the two sliding parts, and the top end of the middle plate is set to a triangular structure.

[0008] Furthermore, the sliding member includes a main sliding member and two hanging plates. The two hanging plates are fixedly connected at the top of the inner wall of the cover body. The main sliding member is provided with a sliding groove on the front and back sides. The two hanging plates are provided with sliding protrusions on the inner sides. The sliding protrusions of the two hanging plates are respectively slidably engaged in the sliding grooves on the front and back sides of the main sliding member. The sliding protrusions of the two hanging plates are respectively transmission-connected to the inner walls of the two sliding grooves through two springs. The main sliding member is provided with a roller at one end facing the middle plate.

[0009] Furthermore, a plurality of rollers are arranged on the side wall of the hanging plate facing the main sliding member and on the upper and lower surfaces of the hanging plate sliding protrusion.

[0010] Furthermore, an oil storage tank is arranged inside the hanging plate, and the three groups of roller side walls all penetrate into the oil storage tank inside the oil storage tank.

[0011] Furthermore, a plurality of vertical through grooves are provided on both sides of the middle plate, and pressure plates are slidably sleeved in a plurality of the vertical through grooves. A vertical connecting groove extending from the middle plate to the back is provided on the front side, and a connecting plate is slidably sleeved in the vertical connecting groove. The tops of a plurality of the pressure plates are fixedly connected to the connecting plate, and a lifting mechanism is provided inside the vertical connecting groove, and the lifting mechanism is used to control the lifting and lowering of the connecting plate.

[0012] Furthermore, the lifting mechanism is composed of a threaded rod and a knob. The threaded rod is fixedly connected at the bottom end of the knob. A notch groove is provided at the top of the middle plate. A screw hole is provided at the top of the notch groove and penetrates into the vertical connecting groove. The knob is movably sleeved in the screw hole. The connecting plate is threadedly sleeved on the side wall of the threaded rod. A through hole is provided at the top of the pressure plate and penetrates to the bottom, and the threaded rod passes through the through hole.

[0013] Furthermore, side plates are provided at both ends of the bottom of the plurality of pressure plates, a plurality of grooves penetrating to the bottom are provided on the top of the bottom plate, and the cross-section of the bottom plate is semi-elliptical.

[0014] Furthermore, a plurality of vertical plates are fixedly connected to both sides of the bottom of the base plate.

[0015] Technical effects and advantages of the present invention: The present invention provides structural support for the box body and the cover body by providing an internal support assembly to ensure the strength of the overall structure, and a semi-open combined connection relationship is formed by the auxiliary hook on the cover body and the main hook on the internal support assembly. When the cover body is subjected to external pressure, the auxiliary hook and the main hook can form a dislocation disconnection effect, thereby avoiding the connection structure from forming a confrontation relationship with the external force to cause damage to the connection, causing the cover body to fall off; An outward expansion mechanism is also arranged on the inner wall of the cover body, and a linkage effect can be produced through the outward expansion mechanism and the middle plate of the inner support assembly. When the cover body is subjected to force, the outward expansion mechanism is triggered by the inner support assembly to play an internal fixing effect on the box body, effectively preventing the cover body from falling off when the connection structure is in a disconnected state when the cover body is subjected to force. Moreover, through the structural setting of the outward expansion mechanism, after the cover body is no longer subjected to the impact, the auxiliary hook and the main hook can be driven in the reverse direction to resume the connection, thereby ensuring that the connection is not damaged and the stability of the connection between the box body and the cover body can be ensured. In addition, the middle plate can also play the role of dividing the internal space of the box body, which is conducive to isolating and classifying the wiring when arranging multiple water and electricity lines to prevent mutual interference. At the same time, it also has a supporting effect on the cover body to prevent the middle part of the cover body from collapsing under force and causing damage to the line. The internal structure setting also has an axial fixing effect on the internal line of the box body to prevent axial displacement of the line. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of the internal support assembly structure; Figure 3 For the present invention Figure 1 Schematic diagram of the outward expansion mechanism structure; Figure 4 For the present invention Figure 3 Schematic diagram of the sliding member structure in FIG. Figure 5 For the present invention Figure 4 Schematic diagram of the cross-sectional structure of the hanging plate; Figure 6 For the present invention Figure 2 Schematic diagram of the middle plate structure; Figure 7 For the present invention Figure 6 Schematic diagram of the cross-section structure of the middle plate in FIG. Figure 8 For the present invention Figure 6 Schematic diagram of the pressure plate structure in FIG. Fig. 9 For the present invention Figure 8 Schematic diagram of the base plate structure.

[0017] The accompanying drawings are marked as follows: 1. box body; 2. cover body; 21. auxiliary hook; 3. inner support assembly; 4. outward expansion mechanism; 5. solid corner block; 31. bottom plate; 32. L-shaped side plate; 33. main hook; 34. middle plate; 41. sliding member; 42. main sliding member; 43. hanging plate; 44. spring; 45. roller; 431. roller; 432. oil storage tank; 341. vertical through groove; 342. vertical connecting groove; 36. pressure plate; 37. connecting plate; 38. lifting mechanism; 381. threaded rod; 382. knob; 311. strip groove; 361. side plate; 39. vertical plate. DETAILED DESCRIPTION

[0018] The specific implementation modes of the present invention are described in detail below with reference to the accompanying drawings.

[0019] Reference Figure 1 and Figure 2 The present invention provides an anti-slip cable trough for exposed installation of water and electricity, comprising a box body 1, a cover body 2 is combined and connected at the top of the box body 1, a plurality of inner support components 3 are arranged inside the box body 1, both sides of the bottom end of the cover body 2 are provided with auxiliary hooks 21 facing downward, a plurality of outward expansion mechanisms 4 are arranged at the bottom of the cover body 2, and the outward expansion mechanism 4 forms a supporting force on both sides of the inner wall of the box body 1 to prevent the box body 1 from slipping off; the inner support component 3 comprises a bottom plate 31, both sides of the bottom plate 31 are provided with L-shaped side plates 32, the two L-shaped side plates 32 penetrate the box body 1 and are respectively fixedly connected to the two side walls of the box body 1, the tops of the two L-shaped side plates 32 are provided with main hooks 33 that fit with the auxiliary hooks 21 and face upward, and a middle plate 34 is fixedly connected to the top of the bottom plate 31; the middle plate 34 is used to support the cover body 2, separate the internal space of the box body 1, and cooperate with the outward expansion mechanism 4 to control the outward expansion of the outward expansion mechanism 4.

[0020] When in use, the water and electricity lines are routed inside the box body 1. By setting up the internal support assembly 3, the structure of the box body 1 can be reinforced to prevent the device from being deformed and damaged by pressure. When the cover body 2 is installed, the auxiliary hook 21 of the cover body 2 is combined and fixed with the main hook 33 of the internal support assembly 3. This structural combination can achieve a semi-open effect. When the cover body 2 is pressed by external force, the cover body 2 moves downward, and the auxiliary hook 21 and the main hook 33 are dislocated up and down to achieve a decoupling effect, thereby not forming a direct confrontation with the external force, thereby avoiding damage. While the cover body 2 moves downward, the internal support assembly 3 contacts the external expansion mechanism 4 to resist the external force. The expansion mechanism 4 achieves a triggering effect, which can make the outward expansion mechanism 4 expand outward to form an external support force on both sides of the inner wall of the box body 1, and clamp the two sides of the box body 1 under the joint action of the two L-shaped side plates 32, so as to achieve the effect of combining and connecting the box body 1 and the cover body 2 again, thereby preventing the cover body 2 from falling off when the auxiliary hook 21 and the main hook 33 are unhooked. In addition, the internal support component 3 divides the internal space of the box body 1 to achieve the effect of classifying and routing multiple lines to prevent the lines from being entangled. When the cover body 2 is pressed by external force, the top of the internal support component 3 supports the bottom of the cover body 2, which can prevent the collapse of the middle part of the cover body 2 from affecting the line.

[0021] Reference Figure 1 Solid corner blocks 5 are provided on both sides of the inner wall of the cover body 2. The two solid corner blocks 5 are respectively located at the top of the two main hooks 33. When the cover body 2 is forced to move downward, the top of the inner wall of the cover body 2 will form a compressive force on the top edge of the box body 1.

[0022] Since the box body 1 is usually made of plastic material, the edges are relatively fragile and easily damaged by pressure. By providing a solid corner block 5, when the cover body 2 moves downward, the solid corner block 5 is supported by the main hook 33. At this time, the edge of the box body 1 no longer supports the cover body 2, thereby protecting the top edge of the box body 1.

[0023] Reference Figure 2 , 3 The outward expansion mechanism 4 is composed of two sliding members 41, and there is a gap between the two sliding members 41, and the top end of the middle plate 34 is set to a triangular structure.

[0024] Since the box body 1 and the cover body 2 are mainly connected by the auxiliary hook 21 and the main hook 33, this connection makes it easy to disassemble the cover body 2 for convenient maintenance of the power transmission line. When the outward expansion mechanism 4 is triggered to expand outward, an internal locking effect is formed inside the cover body 2. In order to avoid the internal locking effect from affecting the disassembly of the cover body 2, the middle plate 34 and the outward expansion mechanism 4 are designed in a linkage manner. Through the triangular design at the top of the middle plate 34, when the cover body 2 is forced to move downward, the outward expansion mechanism 4 moves downward. At this time, the triangular structure on the top of the middle plate 34 is inserted into the gap between the two sliding members 41. Under the influence of the slopes on both sides of the triangular structure, the downward pressure is converted into an outward expansion force on both sides, so that the two sliding members 41 slide outward to support the two sides of the inner wall of the box body 1. When the cover body 2 is not under pressure, the supporting force of the two sliding members 41 on both sides disappears, thereby achieving an internal locking effect that only takes effect when the cover body 2 is under pressure and does not affect the subsequent disassembly operation of the cover body 2.

[0025] Reference Figure 4 The sliding member 41 includes a main sliding member 42 and two hanging plates 43. The two hanging plates 43 are fixedly connected at the top of the inner wall of the cover body 2. The main sliding member 42 is provided with sliding grooves on the front and back sides. The inner sides of the two hanging plates 43 are provided with sliding protrusions. The sliding protrusions of the two hanging plates 43 are respectively slidably sleeved in the sliding grooves on the front and back sides of the main sliding member 42. The sliding protrusions of the two hanging plates 43 are respectively connected to the inner walls of the two sliding grooves through two springs 44. A roller 45 is provided at one end of the main sliding member 42 facing the middle plate 34.

[0026] When the cover body 2 is pressed and moves downward, the auxiliary hook 21 and the main hook 33 are misaligned up and down to form a decoupled state. When the force on the cover body 2 is over, the outward expansion mechanism 4 does not have the external support and fixing effect. At this time, the cover body 2 is still at risk of falling off. In order to avoid this situation, the sliding member 41 mechanism is improved. When the sliding member 41 contacts the slope of the middle plate 34 and is forced to expand outward, the main sliding member 42 produces a displacement. The sliding support block of the hanging plate 43 changes its relative position in the slide groove of the main sliding member 42, and generates pressure on the spring 44 to compress it. When the cover body 2 is no longer under pressure, the main sliding member 42 is reset due to the elastic effect of the spring 44. At this time, the two sliding members 41 have an inward retraction effect, and in the opposite direction, an upward pushing force is formed on the cover body 2 to move the cover body 2 upward and reset. At this time, the auxiliary hook 21 and the main hook 33 are reassembled.

[0027] Reference Figure 5 A plurality of rollers 431 are provided on the side wall of the hanging plate 43 facing the main sliding member 42 and on the upper and lower surfaces of the sliding protrusion of the hanging plate 43.

[0028] Since there is a vertical force between the main slide 42 and the hanging plate 43 during operation, a large friction force will be generated when the main slide 42 and the hanging plate 43 are relatively displaced. In order to avoid the influence of this friction force on the movement of the main slide 42, three groups of rollers 431 are set to reduce the friction on each contact surface of the main slide 42 and the hanging plate 43.

[0029] Reference Figure 5 An oil storage tank 432 is provided inside the hanging plate 43 , and the side walls of the three groups of rollers 431 all penetrate into the oil storage tank 432 .

[0030] The oil storage tank 432 is used to store lubricating oil. When the main slider 42 is displaced, the roller 431 rolls. Through this structural design, the side wall of the roller 431 can be automatically lubricated. On the one hand, the loss of the roller 431 is reduced, and on the other hand, the friction force when the main slider 42 is displaced can be further reduced.

[0031] Reference Figure 6 A plurality of vertical through grooves 341 are provided on both sides of the middle plate 34, and a pressure plate 36 is slidably sleeved in each of the vertical through grooves 341. A vertical connecting groove 342 is provided on the front side of the middle plate 34 and extends to the back side. A connecting plate 37 is slidably sleeved in the vertical connecting groove 342. The tops of the pressure plates 36 are fixedly connected to the connecting plate 37. A lifting mechanism 38 is provided in the vertical connecting groove 342, and the lifting mechanism 38 is used to control the lifting and lowering of the connecting plate 37.

[0032] Traditional cable ducts can only provide decorative protection for exposed lines, but cannot perform axial positioning of the lines. When the end of the line is exposed outside the cable duct and is subjected to pulling force, there is still a risk of damage. This situation can be avoided by providing a pressure plate 36. When the line is arranged into the box body 1, the line is located at the bottom of the pressure plate 36 on the top of the bottom plate 31. The connecting plate 37 is controlled to move downward by the lifting mechanism 38. Under the connection effect of the connecting plate 37, several pressure plates 36 can be moved downward synchronously, and cooperate with the bottom plate 31 to achieve the effect of clamping the line, thereby performing axial positioning of the line.

[0033] Reference Figure 7 The lifting mechanism 38 is composed of a threaded rod 381 and a knob 382. The threaded rod 381 is fixedly connected to the bottom end of the knob 382. A notch groove is provided at the top of the middle plate 34. A screw hole is provided at the top of the notch groove and penetrates to the inside of the vertical connecting groove 342. The knob 382 is movably sleeved in the screw hole. The connecting plate 37 is threadedly sleeved on the side wall of the threaded rod 381. A through hole is provided at the top of the pressure plate 36 and penetrates to the bottom, and the threaded rod 381 passes through the through hole.

[0034] By rotating the knob 382 to drive the threaded rod 381 to rotate, the lifting effect of the connecting plate 37 is controlled under the effect of the threaded structure. Through this structural design, the lifting mechanism 38 is controlled outside the vertical connecting groove 342, thereby making it easier to control the pressure plate 36.

[0035] Reference Figure 8 The bottom ends of the plurality of pressing plates 36 are both provided with side plates 361 , the top of the bottom plate 31 is provided with a plurality of grooves 311 penetrating to the bottom, and the cross-section of the bottom plate 31 is semi-elliptical.

[0036] By providing the side plates 361, side baffles can be formed for the circuits clamped by the bottom plate 31 and the pressure plate 36 to prevent the circuits from detaching from between the bottom plate 31 and the pressure plate 36. By providing the strip grooves 311, the side plates 361 can be embedded in the strip grooves 311 when the pressure plate 36 moves downward. When used for thinner circuits, the side plates 361 can be prevented from supporting the pressure plate 36, resulting in an inability to clamp the thinner circuits. The semi-elliptical design of the bottom plate 31 makes the positions of the two sides of the bottom of the bottom plate 31 higher than the middle position. Therefore, when used for thicker circuits, the distance between the two sides of the pressure plate 36 and the bottom plate 31 can be smaller than the diameter of the circuit. Even if the side plates 361 are not embedded in the strip grooves 311, the anti-falling effect can still be achieved.

[0037] Reference Fig. 9 A plurality of vertical plates 39 are fixedly connected to both sides of the bottom of the bottom plate 31 .

[0038] Since the bottom plate 31 is in a semi-elliptical shape, when the forces on both sides of the bottom plate 31 are large, the bottom plate 31 is easily deformed. By setting the vertical plates 39, support forces can be provided for both sides of the bottom plate 31 to achieve an anti-deformation effect.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. The present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A water and electricity exposed anti-slip cable trough, comprising a box body (1), the top of the box body (1) is assembled and connected with a cover body (2), characterized in that: A plurality of internal support components (3) are arranged inside the box body (1), and auxiliary hooks (21) facing downward are arranged on both sides of the bottom end of the cover body (2). A plurality of outward expansion mechanisms (4) are arranged at the bottom of the cover body (2), and the outward expansion mechanisms (4) expand outward to form a supporting force on both sides of the inner wall of the box body (1) to prevent the box body (1) from falling off; The inner support assembly (3) comprises a bottom plate (31), L-shaped side plates (32) are arranged on both sides of the bottom plate (31), the two L-shaped side plates (32) penetrate the box body (1) and are respectively fixedly connected to the two side walls of the box body (1), the tops of the two L-shaped side plates (32) are each provided with a main hook (33) that fits with the auxiliary hook (21) and faces upward, and the top of the bottom plate (31) is fixedly connected to a middle plate (34); The middle plate (34) is used to support the cover body (2), to separate the internal space of the box body (1), and to work in conjunction with the outward expansion mechanism (4) to control the outward expansion of the outward expansion mechanism (4).

2. The anti-slip cable duct for water and electricity exposed installation according to claim 1 is characterized by: Solid corner blocks (5) are provided on both sides of the inner wall of the cover body (2), and the two solid corner blocks (5) are respectively located at the top of the two main hooks (33). When the cover body (2) is forced to move downward, the top of the inner wall of the cover body (2) will form a compressive force on the top edge of the box body (1).

3. The anti-slip cable duct for water and electricity exposed installation according to claim 1 is characterized by: The outward expansion mechanism (4) is composed of two sliding members (41), and there is a gap between the two sliding members (41), and the top end of the middle plate (34) is arranged in a triangular structure.

4. The anti-slip cable duct for water and electricity exposed installation according to claim 3 is characterized by: The sliding member (41) includes a main sliding member (42) and two hanging plates (43). The two hanging plates (43) are fixedly connected to the top of the inner wall of the cover body (2). The front and back of the main sliding member (42) are each provided with a sliding groove. The inner sides of the two hanging plates (43) are each provided with a sliding protrusion. The sliding protrusions of the two hanging plates (43) are respectively slidably sleeved in the sliding grooves on the front and back sides of the main sliding member (42). The sliding protrusions of the two hanging plates (43) are respectively connected to the inner walls of the two sliding grooves through two springs (44). The main sliding member (42) is provided with a roller (45) at one end facing the middle plate (34).

5. The anti-slip cable duct for water and electricity exposed installation according to claim 4 is characterized by: A plurality of rollers (431) are arranged on the side wall of the hanging plate (43) facing the main sliding member (42) and on the upper and lower surfaces of the sliding protrusion of the hanging plate (43).

6. The anti-slip cable duct for water and electricity exposed installation according to claim 5, characterized in that: An oil storage tank (432) is provided inside the hanging plate (43), and the side walls of the three groups of rollers (431) all penetrate into the oil storage tank (432).

7. The anti-slip cable duct for water and electricity exposed installation according to claim 1 is characterized by: A plurality of vertical through grooves (341) are provided on both sides of the middle plate (34), and a plurality of the vertical through grooves (341) are slidably sleeved with a pressing plate (36). A vertical connecting groove (342) extending from the middle plate (34) to the back is provided on the front side, and a connecting plate (37) is slidably sleeved inside the vertical connecting groove (342). The tops of the plurality of pressing plates (36) are fixedly connected to the connecting plate (37). A lifting mechanism (38) is provided inside the vertical connecting groove (342), and the lifting mechanism (38) is used to control the lifting of the connecting plate (37).

8. The anti-slip cable duct for water and electricity exposed installation according to claim 7, characterized in that: The lifting mechanism (38) is composed of a threaded rod (381) and a knob (382); the threaded rod (381) is fixedly connected to the bottom end of the knob (382); a notch groove is provided at the top of the middle plate (34); a rotary hole is provided at the top of the notch groove and penetrates to the inside of the vertical connecting groove (342); the knob (382) is movably sleeved in the rotary hole; the connecting plate (37) is threadedly sleeved on the side wall of the threaded rod (381); a through hole is provided at the top of the pressure plate (36) and penetrates to the bottom; the threaded rod (381) passes through the through hole.

9. The anti-slip cable duct for water and electricity exposed installation according to claim 8, characterized in that: Both ends of the bottom of the plurality of pressing plates (36) are provided with side plates (361), the top of the bottom plate (31) is provided with a plurality of grooves (311) penetrating to the bottom, and the cross-section of the bottom plate (31) is in a semi-elliptical shape.

10. The anti-slip cable duct for water and electricity exposed installation according to claim 9, characterized in that: A plurality of vertical plates (39) are fixedly connected to both sides of the bottom of the bottom plate (31).

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