Shoe sole rubber fatigue and cracking detection equipment for simulating rainy environment

Abstract

The invention discloses shoe sole rubber fatigue and cracking detection equipment for simulating a rainy environment, and belongs to the technical field of rubber quality detection. Comprising a driving mechanism, a water supply mechanism, a detection mechanism and a fixing mechanism, the driving mechanism comprises a controller, a driving part is arranged in the controller, the detection mechanism comprises a fixing frame and an adjusting part, rollers are arranged at the bottom of the fixing frame, the adjusting part adjusts the height of the rollers, the water supply mechanism comprises a water tank containing clear water and a water pumping part, and a tank cover is installed at the top of the water tank. The top of the box cover is provided with a fixing seat, the top of the fixing seat is provided with a fixing frame, the fixing frame is internally provided with a water box, the water pumping piece pumps clean water into the water box, the top of the fixing frame is provided with a fixing plate, the top of the water box and the top of the fixing plate are provided with connected through holes, and the driving piece drives the rolling wheels to roll at the top of the fixing plate. The fixing mechanism comprises a first fixing piece arranged on the top of the fixing base and a second fixing piece arranged on the outer side of the rolling wheel.

Description

Technical Field

[0001] The invention relates to the technical field of rubber quality detection, in particular to a sole rubber fatigue and crack detection device in a simulated rainy day environment. Background Art

[0002] Rubber soles refer to soles made of rubber. Rubber sole materials can be roughly divided into natural rubber or synthetic rubber. The advantage of natural rubber is that it is very soft and elastic, suitable for various sports, and plays a role in shock absorption. However, its disadvantage is also obvious, that is, it has poor resistance to oil, ozone aging and thermal oxygen aging. Sports shoes are mostly made of natural rubber. The durability of rubber soles is one of the standards for measuring the quality of shoes.

[0003] At present, the durability test method for rubber soles is usually to deform the sole to simulate the state of walking, and then repeatedly stretch and bend the sole to test how many times the sole will break. However, rubber breaks in different environments requiring different numbers of stretching and bending. However, the existing technology cannot simulate the breakage of rubber soles in rainy environments, so the test of rubber soles is not comprehensive enough. Summary of the invention

[0004] The purpose of the present invention is to provide a sole rubber fatigue and cracking detection device in a simulated rainy environment to solve the problems raised in the above background technology.

[0005] In view of the above problems, the technical solution proposed by the present invention is:

[0006] A sole rubber fatigue and cracking detection device in a simulated rainy day environment comprises a driving mechanism, a water supply mechanism, a detection mechanism and a fixing mechanism, wherein the driving mechanism comprises a controller, wherein a driving member is arranged inside the controller, wherein the detection mechanism comprises a second fixing frame and an adjusting member, wherein a roller is arranged at the bottom of the second fixing frame, wherein the adjusting member adjusts the height of the roller, wherein the water supply mechanism comprises a water tank filled with clean water and a water pumping member, wherein a box cover is arranged on the top of the water tank, wherein a fixing seat is arranged on the top of the box cover, wherein a first fixing frame is arranged on the top of the fixing seat, wherein a water box is arranged inside the first fixing frame, wherein the water pumping member pumps clean water into the water box, wherein a fixing plate is arranged on the top of the first fixing frame, wherein the tops of the water box and the fixing plate are both provided with connected through holes, wherein the driving member drives the roller to roll on the top of the fixing plate, wherein the fixing mechanism comprises a first fixing member arranged on the top of the fixing seat and a second fixing member arranged on the outside of the roller, wherein the first fixing member and the second fixing member respectively fix two ends of the rubber sole. As a preferred technical solution of the present invention, it is characterized in that the water pumping component includes a first hose located in the water tank, a second hose located inside the tank cover, and a pump installed at the bottom of the tank cover, one end of the first hose is connected to the input end of the pump, one end of the second hose is connected to the output end of the pump, and the free end of the second hose is connected to the bottom of the water box.

[0007] As a preferred technical solution of the present invention, it is characterized in that a first water flow trough is provided on one side of the fixed seat, a second water flow trough connected to the first water flow trough is provided on the top of the box cover, a partition is installed inside the water tank, the second water flow trough is located on one side of the partition, and the free end of the first hose is located on the other side of the partition.

[0008] As a preferred technical solution of the present invention, it is characterized in that a driving cavity is provided on the top of the controller, a protective cover is installed on the top of the controller, the driving member includes an electric telescopic rod installed inside the driving cavity, and the telescopic end of the electric telescopic rod is connected to a driving bar, a fixing bar is installed on the outside of the second fixing frame, and the fixing bar is installed on the top of the driving bar.

[0009] As a preferred technical solution of the present invention, it is characterized in that a limiting groove is provided at the bottom of the driving cavity, the driving bar is suspended inside the driving cavity, a limiting wheel is installed at the bottom of the driving bar, and the limiting wheel rolls in the limiting groove.

[0010] As a preferred technical solution of the present invention, it is characterized in that a limiting frame is installed on one side of the protective cover, a limiting cavity is opened on the top of the limiting frame, and the second fixing frame slides inside the limiting cavity.

[0011] As a preferred technical solution of the present invention, it is characterized in that the adjusting member includes an adjusting block sliding inside the second fixed frame, the top of the adjusting block is rotatably connected to a first threaded rod that passes through the second fixed frame, and a first threaded sleeve is installed on the top of the second fixed frame, the first threaded rod and the first threaded sleeve are threadedly engaged with each other, a first handle is installed on the top of the first threaded rod, the adjusting member also includes a pair of connecting strips installed at the bottom of the adjusting block, and the roller is rotatably installed between the pair of connecting strips.

[0012] As a preferred technical solution of the present invention, it is characterized in that the first fixing member includes a pair of second threaded rods, a pressure strip, a second threaded sleeve, and a connecting cover installed on the top of the fixing seat, both ends of the pressure strip are provided with sliding holes, the second threaded rod slides in the sliding holes, the second threaded sleeve and the second threaded rod are threadedly engaged and squeeze the top of the pressure strip, a limiting rod is installed on the top of the second threaded rod, and the connecting cover is installed on the top of the second threaded sleeve and slides on the outside of the limiting rod. As a preferred technical solution of the present invention, it is characterized in that the second fixing member includes a pair of connecting blocks installed on the outside of the roller, an arc plate is rotatably connected between the pair of connecting blocks, one end of the arc plate is threadedly engaged and connected to a third threaded rod, and a second handle is installed on the top of the third threaded rod, and the bottom end of the third threaded rod is against the roller.

[0013] As a preferred technical solution of the present invention, a base is installed on one side of the controller, the water tank is installed on the top of the base, and feet are installed on the bottom of the controller and the base.

[0014] On the other hand, the present invention provides a method for detecting fatigue and cracking of sole rubber in a simulated rainy environment, comprising the following steps:

[0015] Step 1: Refill the water tank with clean water. At the same time, the replenishing position is located on one side of the partition, that is, in the space where the first hose is located, while the other side of the partition is not replenished with clean water;

[0016] Step 2: Use the first handle to drive the first threaded rod to rotate, so that the adjustment block slides inside the second fixing frame, so that a suitable space is left between the roller and the fixing plate, the sole is placed in the space, and the two ends of the sole are fixed by the first fixing member and the second fixing member, and then the first handle is rotated so that the roller presses the sole;

[0017] Step 3: Start the pump to allow clean water to flow into the water box through the first hose and the second hose. After the water box is filled with clean water, the clean water will overflow from the through hole and wet the sole;

[0018] Step 4: Start the electric telescopic rod to drive the driving bar to make reciprocating linear motion, so that the universal wheel rolls back and forth on the surface of the sole. At this time, the sole will be stretched and bent. One extension and shortening of the electric telescopic rod is regarded as one cycle. The controller is equipped with a counter, which is used to record the number of cycles of the electric telescopic rod until the sole breaks. At this time, the durability of the sole in rainy days can be known by the number of cycles of the electric telescopic rod.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: the sole rubber fatigue and cracking detection equipment in a simulated rainy day environment, by pumping clean water into a water box, after the clean water in the water box is full, the clean water will overflow from the through hole and wet the rubber sole, and then the rubber sole will be bent and stretched through the driving mechanism, the detection mechanism, and the fixing mechanism, thereby simulating the use scenario of the rubber sole in rainy days, and testing the number of times the rubber sole can be stretched and bent in this scenario, and finally evaluating the quality of the tested rubber sole. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a first three-dimensional structural schematic diagram of a sole rubber fatigue and cracking detection device in a simulated rainy environment disclosed in an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of the explosion structure of the sole rubber fatigue and cracking detection equipment in a simulated rainy environment disclosed in an embodiment of the present invention;

[0022] Figure 3 for Figure 2 A schematic diagram of the structure of structure A in the middle;

[0023] Figure 4 for Figure 2 A schematic diagram of the structure of structure B in the middle;

[0024] Figure 5 for Figure 2 A schematic diagram of the structure of the C structure in the middle;

[0025] Figure 6 It is a second three-dimensional structural schematic diagram of the sole rubber fatigue and cracking detection device in a simulated rainy environment disclosed in an embodiment of the present invention.

[0026] In the figure: 100, driving mechanism; 1001, controller; 1002, driving chamber; 1003, electric telescopic rod; 1004, protective cover; 1005, limit frame; 1006, limit chamber; 1007, driving bar; 200, water supply mechanism; 2001, base; 2002, water tank; 2003, partition; 2004, first hose; 2005, tank cover; 2006, second hose; 2007, fixing seat; 2008, fixing frame; 2009, water box; 2010, fixing plate; 2011, through hole; 2012, second water flow channel; 2013 , first water flow trough; 300, detection mechanism; 3001, fixing frame; 3002, fixing strip; 3003, adjusting block; 3004, connecting strip; 3005, roller; 3006, first threaded rod; 3007, first threaded sleeve; 3008, first handle; 400, fixing mechanism; 4001, second threaded rod; 4002, pressure strip; 4003, sliding hole; 4004, limiting rod; 4005, second threaded sleeve; 4006, connecting cover; 4007, connecting block; 4008, arc plate; 4009, third threaded rod; 4010, second handle. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1 - Figure 6The present invention provides a technical solution: a sole rubber fatigue and cracking detection device in a simulated rainy day environment, comprising a driving mechanism 100, a water supply mechanism 200, a detection mechanism 300, and a fixing mechanism 400. The driving mechanism 100 comprises a controller 1001, and a driving member is arranged in the controller 1001. The detection mechanism 300 comprises a second fixing frame 3001 and an adjusting member. A roller 3005 is arranged at the bottom of the second fixing frame 3001. The adjusting member adjusts the height of the roller 3005. The water supply mechanism 200 comprises a water tank 2002 filled with clean water and a water pump. A tank cover 2005 is installed on the top of the water tank 2002. The top of the tank cover 2005 is installed There is a fixing seat 2007, a first fixing frame 2008 is installed on the top of the fixing seat 2007, a water box 2009 is installed inside the first fixing frame 2008, a water pump pumps clean water into the water box 2009, a fixing plate 2010 is installed on the top of the first fixing frame 2008, the tops of the water box 2009 and the fixing plate 2010 are both provided with connected through holes 2011, a driving member drives the roller 3005 to roll on the top of the fixing plate 2010, a fixing mechanism 400 includes a first fixing member arranged on the top of the fixing seat 2007 and a second fixing member arranged on the outside of the roller 3005, and the first fixing member and the second fixing member respectively fix the two ends of the rubber sole.

[0029] An embodiment of the present invention is further characterized in that the water pumping member includes a first hose 2004 located in the water tank 2002, a second hose 2006 located inside the tank cover 2005, and a pump installed at the bottom of the tank cover 2005, one end of the first hose 2004 is connected to the input end of the pump, one end of the second hose 2006 is connected to the output end of the pump, and the free end of the second hose 2006 is connected to the bottom of the water box 2009.

[0030] An embodiment of the present invention is further characterized in that a first water flow trough 2013 is provided on one side of the fixed seat 2007, a second water flow trough 2012 connected to the first water flow trough 2013 is provided on the top of the box cover 2005, a partition 2003 is installed inside the water tank 2002, the second water flow trough 2012 is located on one side of the partition 2003, and the free end of the first hose 2004 is located on the other side of the partition 2003.

[0031] Specifically, the partition 2003 divides the interior of the water tank 2002 into two spaces for storing clean water and sewage, wherein the free end of the first hose 2004 is located in the space for storing clean water in the water tank 2002, and the second water flow trough 2012 is located above the space for storing sewage in the water tank 2002. When testing the sole, since the top of the fixing seat 2007 is an inclined surface, the sewage after the test will slide from the inclined surface into the first water flow trough 2013 and flow into the water tank 2002 through the second water flow trough 2012.

[0032] An embodiment of the present invention is further characterized in that a driving cavity 1002 is provided on the top of the controller 1001, a protective cover 1004 is installed on the top of the controller 1001, the driving member includes an electric telescopic rod 1003 installed inside the driving cavity 1002, and the telescopic end of the electric telescopic rod 1003 is connected to a driving bar 1007, a fixing bar 3002 is installed on the outer side of the second fixed frame 3001, and the fixing bar 3002 is installed on the top of the driving bar 1007.

[0033] An embodiment of the present invention is further characterized in that a limiting groove is provided at the bottom of the driving cavity 1002, the driving bar 1007 is suspended inside the driving cavity 1002, a limiting wheel is installed at the bottom of the driving bar 1007, and the limiting wheel rolls in the limiting groove.

[0034] Specifically, the outer side of the suspended driving bar 1007 does not contact the driving cavity 1002, so the friction of its movement can be reduced. At the same time, the limiting wheel and the limiting groove can provide stability for the movement of the driving bar 1007, and the friction between the rolling limiting wheel and the limiting groove is also small.

[0035] An embodiment of the present invention is further characterized in that a limiting frame 1005 is installed on one side of the protection cover 1004 , a limiting cavity 1006 is provided on the top of the limiting frame 1005 , and the second fixing frame 3001 slides inside the limiting cavity 1006 .

[0036] An embodiment of the present invention is further characterized in that the adjusting member includes an adjusting block 3003 sliding inside the second fixed frame 3001, the top of the adjusting block 3003 is rotatably connected with a first threaded rod 3006 penetrating the second fixed frame 3001, and a first threaded sleeve 3007 is installed on the top of the second fixed frame 3001, the first threaded rod 3006 and the first threaded sleeve 3007 are threadedly engaged with each other, a first handle 3008 is installed on the top of the first threaded rod 3006, and the adjusting member also includes a pair of connecting strips 3004 installed at the bottom of the adjusting block 3003, and a roller 3005 is rotatably installed between the pair of connecting strips 3004.

[0037] Specifically, by rotating the first threaded rod 3006 using the first handle 3008, the height of the roller 3005 can be changed, thereby facilitating the user to place the sole in the gap between the roller 3005 and the fixing plate 2010, while allowing the roller 3005 to press the sole.

[0038] An embodiment of the present invention is further characterized in that the first fixing member includes a pair of second threaded rods 4001, a pressure strip 4002, a second threaded sleeve 4005, and a connecting cover 4006 installed on the top of the fixing seat 2007, both ends of the pressure strip 4002 are provided with sliding holes 4003, the second threaded rod 4001 slides in the sliding holes 4003, the second threaded sleeve 4005 and the second threaded rod 4001 are threadedly engaged and squeeze the top of the pressure strip 4002, a limiting rod 4004 is installed on the top of the second threaded rod 4001, and the connecting cover 4006 is installed on the top of the second threaded sleeve 4005 and slides on the outside of the limiting rod 4004.

[0039] Specifically, the pressure strip 4002 is pressed on one end of the sole. After tightening the second threaded sleeve 4005, the top of the pressure strip 4002 can be squeezed to fix one end of the sole. After the second threaded sleeve 4005 is screwed out of the second threaded rod 4001, the limiting rod 4004 can be used to hang the connecting cover 4006 on it to prevent the connecting cover 4006 from being lost.

[0040] An embodiment of the function of the present invention is further characterized in that the second fixing member includes a pair of connecting blocks 4007 installed on the outside of the roller 3005, an arc plate 4008 is rotatably connected between the pair of connecting blocks 4007, one end of the arc plate 4008 is threadedly engaged with a third threaded rod 4009, and a second handle 4010 is installed on the top of the third threaded rod 4009, and the bottom end of the third threaded rod 4009 is against the roller 3005.

[0041] Specifically, after the third threaded rod 4009 is screwed in, the third threaded rod 4009 will lift one end of the arc plate 4008 and press the other end of the arc plate 4008 downward. If one side of the sole is placed in the gap between the other end of the arc plate 4008 and the roller 3005 in advance, it can be pressed tightly by the other end that is pressed downward.

[0042] The present invention is an embodiment of the present invention. Further, a base 2001 is installed on one side of the controller 1001, a water tank 2002 is installed on the top of the base 2001, and feet are installed on the bottom of the controller 1001 and the base 2001. The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0043] See also Figure 1 - Figure 6The present invention provides a technical solution: a device for detecting fatigue and cracking of rubber soles in a simulated rainy environment, comprising the following steps:

[0044] Step 1: Replenish clean water in the water tank 2002. At the same time, the replenishing position is located on one side of the partition 2003, that is, in the space where the first hose 2004 is located, while the other side of the partition 2003 is not replenished with clean water;

[0045] Step 2: Use the first handle 3008 to drive the first threaded rod 3006 to rotate, so that the adjustment block 3003 slides inside the second fixing frame 3001, so that a suitable space is left between the roller 3005 and the fixing plate 2010, the sole is placed in the space, and the two ends of the sole are fixed by the first fixing member and the second fixing member, and then the first handle 3008 is rotated so that the roller 3005 presses the sole;

[0046] Step 3: Start the pump so that clean water flows into the water box 2009 through the first hose 2004 and the second hose 2006. After the water box 2009 is filled with clean water, the clean water will overflow from the through hole 2011 and wet the sole;

[0047] Step 4: Start the electric telescopic rod 1003, so that it drives the driving bar 1007 to perform reciprocating linear motion, thereby causing the universal wheel 3005 to roll back and forth on the surface of the sole. At this time, the sole will be stretched and bent. One extension and shortening of the electric telescopic rod 1003 is regarded as one cycle, and the controller 1001 is equipped with a counter. The counter is used to record the number of cycles of the electric telescopic rod 1003 until the sole breaks. At this time, the durability of the sole in rainy days can be known through the number of cycles of the electric telescopic rod 1003.

Claims

1. A sole rubber fatigue and cracking detection device in a simulated rainy environment, characterized in that: The invention comprises a driving mechanism (100), a water supply mechanism (200), a detection mechanism (300), and a fixing mechanism (400); the driving mechanism (100) comprises a controller (1001), a driving member is arranged in the controller (1001); the detection mechanism (300) comprises a second fixing frame (3001) and an adjusting member; a roller (3005) is arranged at the bottom of the second fixing frame (3001), and the adjusting member adjusts the height of the roller (3005); the water supply mechanism (200) comprises a water tank (2002) filled with clean water and a water pump; a tank cover (2005) is arranged on the top of the water tank (2002), a fixing seat (2007) is arranged on the top of the tank cover (2005), and the fixing seat (2007) is provided with a plurality of fixing members. A first fixing frame (2008) is installed on the top, a water box (2009) is installed inside the first fixing frame (2008), the water pumping member pumps clean water into the water box (2009), a fixing plate (2010) is installed on the top of the first fixing frame (2008), the tops of the water box (2009) and the fixing plate (2010) are both provided with connected through holes (2011), the driving member drives the roller (3005) to roll on the top of the fixing plate (2010), the fixing mechanism (400) comprises a first fixing member arranged on the top of the fixing seat (2007) and a second fixing member arranged on the outside of the roller (3005), and the first fixing member and the second fixing member respectively fix two ends of the rubber sole.

2. The sole rubber fatigue and cracking detection device in a simulated rainy environment according to claim 1 is characterized in that: The water pumping component comprises a first hose (2004) located in the water tank (2002), a second hose (2006) located inside the tank cover (2005), and a pump installed at the bottom of the tank cover (2005), one end of the first hose (2004) is connected to the input end of the pump, one end of the second hose (2006) is connected to the output end of the pump, and the free end of the second hose (2006) is connected to the bottom of the water box (2009).

3. The sole rubber fatigue and cracking detection device in a simulated rainy environment according to claim 2 is characterized in that: A first water flow trough (2013) is provided on one side of the fixing seat (2007), a second water flow trough (2012) connected to the first water flow trough (2013) is provided on the top of the box cover (2005), a partition (2003) is installed inside the water tank (2002), the second water flow trough (2012) is located on one side of the partition (2003), and the free end of the first hose (2004) is located on the other side of the partition (2003).

4. The sole rubber fatigue and cracking detection device in a simulated rainy environment according to claim 1 is characterized in that: A driving cavity (1002) is provided on the top of the controller (1001); a protective cover (1004) is installed on the top of the controller (1001); the driving member comprises an electric telescopic rod (1003) installed inside the driving cavity (1002); the telescopic end of the electric telescopic rod (1003) is connected to a driving bar (1007); a fixing bar (3002) is installed on the outer side of the second fixing frame (3001); and the fixing bar (3002) is installed on the top of the driving bar (1007).

5. The sole rubber fatigue and cracking detection device in a simulated rainy environment according to claim 4 is characterized in that: A limiting groove is provided at the bottom of the driving cavity (1002); the driving bar (1007) is suspended inside the driving cavity (1002); a limiting wheel is installed at the bottom of the driving bar (1007), and the limiting wheel rolls in the limiting groove.

6. The sole rubber fatigue and cracking detection device in a simulated rainy environment according to claim 4 is characterized in that: A limiting frame (1005) is installed on one side of the protection cover (1004), a limiting cavity (1006) is provided on the top of the limiting frame (1005), and the second fixing frame (3001) slides inside the limiting cavity (1006).

7. The sole rubber fatigue and cracking detection device in a simulated rainy environment according to claim 1 is characterized in that: The adjusting member comprises an adjusting block (3003) sliding inside the second fixed frame (3001); the top of the adjusting block (3003) is rotatably connected to a first threaded rod (3006) penetrating the second fixed frame (3001); a first threaded sleeve (3007) is installed on the top of the second fixed frame (3001); the first threaded rod (3006) and the first threaded sleeve (3007) are threadedly engaged with each other; a first handle (3008) is installed on the top of the first threaded rod (3006); the adjusting member further comprises a pair of connecting strips (3004) installed at the bottom of the adjusting block (3003); and the roller (3005) is rotatably installed between the pair of connecting strips (3004).

8. The sole rubber fatigue and cracking detection device in a simulated rainy environment according to claim 1 is characterized in that: The first fixing member comprises a pair of second threaded rods (4001), a pressure strip (4002), a second threaded sleeve (4005), and a connecting cover (4006) installed on the top of the fixing seat (2007); both ends of the pressure strip (4002) are provided with sliding holes (4003); the second threaded rod (4001) slides in the sliding holes (4003); the second threaded sleeve (4005) and the second threaded rod (4001) are threadedly engaged and squeeze the top of the pressure strip (4002); a limiting rod (4004) is installed on the top of the second threaded rod (4001); the connecting cover (4006) is installed on the top of the second threaded sleeve (4005) and slides on the outside of the limiting rod (4004).

9. The sole rubber fatigue and cracking detection device in a simulated rainy environment according to claim 8, characterized in that: The second fixing member comprises a pair of connecting blocks (4007) installed on the outside of the roller (3005), an arc plate (4008) is rotatably connected between the pair of connecting blocks (4007), one end of the arc plate (4008) is threadedly engaged with a third threaded rod (4009), and a second handle (4010) is installed at the top end of the third threaded rod (4009), and the bottom end of the third threaded rod (4009) is against the roller (3005).

10. According to the device for detecting fatigue and cracking of rubber soles in a simulated rainy environment as described in claim 1, a base (2001) is installed on one side of the controller (1001), the water tank (2002) is installed on the top of the base (2001), and the bottoms of the controller (1001) and the base (2001) are both installed with feet.

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