阅读说明：本技术 一种建筑工程用便于调节切割间距的切割装置 (Cutting device convenient to adjust cutting interval for building engineering ) 是由 刘忠和 于 2021-08-12 设计创作，主要内容包括：本发明涉及建筑工程技术领域,且公开了一种建筑工程用便于调节切割间距的切割装置,包括外壳,所述外壳的内部活动连接有调节切割机构,调节切割机构包括调节组件,对调节组件进行调节间距的变速组件,对调节组件进行推送的推送组件,外壳的内部活动连接有推送组件,变速组件活动连接在推送组件的内部；通过大齿轮转动带动螺纹杆转动,螺纹杆转动带动螺母块运动,螺母块运动带动切割刀和与切割刀连接的指针运动,使得无需操作者量测建筑材料并在切割点画下标记再进行切割,通过指针在刻度板外部的移动,就能达到辅助操作者对建筑材料切割的间距进行调节的效果,进一步使得本装置符合智能制造的技术理念。(The invention relates to the technical field of constructional engineering, and discloses a cutting device for constructional engineering, which is convenient for adjusting cutting space and comprises a shell, wherein the interior of the shell is movably connected with an adjusting cutting mechanism, the adjusting cutting mechanism comprises an adjusting component, a speed changing component for adjusting the space of the adjusting component, and a pushing component for pushing the adjusting component, the interior of the shell is movably connected with the pushing component, and the speed changing component is movably connected with the interior of the pushing component; rotate through the gear wheel and drive the threaded rod and rotate, the threaded rod rotates and drives the motion of nut piece, and the motion of nut piece drives the cutting knife and the pointer motion of being connected with the cutting knife for need not the operator and measureing building material and mark cutting again under cutting point drawing, through the pointer in the outside removal of scale plate, just can reach the effect that auxiliary operation carries out the regulation to the interval of building material cutting, further make this device accord with the technical theory of intelligent manufacturing.)

1. The utility model provides a building engineering is with cutting device convenient to adjust cutting interval, includes shell (1), its characterized in that: the utility model discloses a cutting mechanism, including shell (1), internally connected with adjusts cutting mechanism (2), adjust cutting mechanism (2) including adjusting part (23), adjust variable speed subassembly (22) of interval to adjusting part (23), carry out propelling movement subassembly (21) of propelling movement to adjusting part (23), the internally connected with propelling movement subassembly (21) of shell (1), the inside at propelling movement subassembly (21) is connected in variable speed subassembly (22), the inside at propelling movement subassembly (21) is connected in adjusting part (23), the externally connected with transmission trigger mechanism (3) of shell (1), the internally connected with external power source (4) of shell (1), the externally connected with touch panel (5) of shell (1).

2. The cutting device for construction engineering convenient to adjust cutting interval of claim 1, characterized in that: the pushing assembly (21) comprises an electric telescopic rod (211), a pushing plate (212) and a sliding groove (213), the electric telescopic rod (211) is fixedly connected inside the shell (1), the pushing plate (212) is fixedly connected outside the electric telescopic rod (211), the sliding groove (213) is formed inside the pushing plate (212), and the pushing plate (212) is slidably connected inside the shell (1).

3. The cutting device for construction engineering convenient to adjust cutting interval of claim 2, characterized in that: the speed change assembly (22) comprises a large gear (221), a middle gear (222), a small gear (223), a rotating block (224), a Z-shaped rod (225), an electromagnet (226), a limiting iron (227), a torsion spring (228) and a button (229), wherein the large gear (221) is rotatably connected to the inside of the pushing plate (212), the middle gear (222) is meshed to the outside of the large gear (221), the small gear (223) is meshed to the outside of the middle gear (222), the rotating block (224) is fixedly connected to the outside of the large gear (221), the Z-shaped rod (225) is clamped to the inside of the rotating block (224), the electromagnet (226) is fixedly connected to the inside of the pushing plate (212), the limiting iron (227) is rotatably connected to the inside of the pushing plate (212), the torsion spring (228) is movably connected to the inside of the limiting iron (227), the button (229) is fixedly connected to the outside of the shell (1), the middle gear (222), The pinions (223) are each rotatably connected to the inside of the housing (1).

4. The cutting device for construction engineering convenient to adjust cutting interval of claim 3, characterized in that: adjusting part (23) includes threaded rod (231), nut piece (232), cutting knife (233), slider (234), pointer (235), scale plate (236), the internal rotation of push plate (212) is connected with threaded rod (231), nut piece (232) threaded connection is in the outside of threaded rod (231), cutting knife (233) fixed connection is in the outside of nut piece (232), slider (234) fixed connection is in the outside of cutting knife (233), pointer (235) fixed connection is in the outside of slider (234), scale plate (236) fixed connection is in the outside of push plate (212), slider (234) sliding connection is in the inside of spout (213).

5. The cutting device for construction engineering convenient to adjust cutting interval of claim 4, characterized in that: the adjusting assemblies (23) are divided into three parts, namely a first adjusting assembly (23), a second adjusting assembly (23) and a third adjusting assembly (23), and the first adjusting assembly (23), the second adjusting assembly (23) and the third adjusting assembly (23) are fixedly connected to the outer parts of the large gear (221), the middle gear (222) and the small gear (223) respectively.

6. The cutting device for construction engineering convenient to adjust cutting interval of claim 5, characterized in that: the transmission trigger mechanism (3) comprises a motor (31), a conveying wheel (32), a conveying belt (33), a material receiving base (34), a contact (35), a trigger table (36) and a spring (37), wherein the motor (31) is fixedly connected to the inside of the shell (1), the conveying wheel (32) is fixedly connected to the outside of the motor (31), the conveying belt (33) is connected to the outside of the conveying wheel (32) in a transmission mode, the material receiving base (34) is fixedly connected to the outside of the shell (1), the contact (35) is fixedly connected to the inside of the material receiving base (34), the trigger table (36) is connected to the inside of the material receiving base (34) in a sliding mode, one end of the spring (37) is fixedly connected to the inside of the material receiving base (34), and the other end of the spring (37) is fixedly connected to the outside of the trigger table (36).

7. The cutting device for construction engineering convenient to adjust cutting interval of claim 6, characterized in that: the touch panel (5), the motor (31), the contact (35), the electromagnet (226) and the button (229) are electrically connected with an external power supply (4), the button (229) is electrically connected with the electromagnet (226), and the motor (31) is electrically connected with the touch panel (5) and the contact (35).

Technical Field

The invention relates to the technical field of constructional engineering, in particular to a cutting device for constructional engineering, which is convenient for adjusting cutting space.

Background

The building engineering refers to an engineering entity formed by the construction of various building auxiliary facilities and the installation activities of lines, pipelines and equipment matched with the same, in order to meet the requirements of people on different lengths of the same material required by the building, people are often required to cut the building material in batches at equal intervals, but the traditional cutting mode is manual cutting, an operator is required to measure the building material once, and the cutting operation is carried out after the mark is drawn at the place needing to be cut, the cutting mode is not accurate enough, if the cutting is carried out in batches, the cutting efficiency is low, the manpower is consumed, the cutting precision cannot be ensured, the labor intensity of workers is increased due to the low cutting efficiency, the construction period is prolonged, the labor cost is increased, the quality of a building finished product cannot be expected due to the inaccurate cutting, and once the building engineering is damaged in use, can cause great harm to people.

Therefore, in order to solve these problems, a cutting device for construction engineering, which is convenient for adjusting the cutting distance, is needed.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a cutting device for building engineering, which is convenient for adjusting the cutting interval, has the advantages of assisting an operator to adjust the cutting interval of building materials and improving the efficiency of the operator to cut the building materials, solves the problem that people are often required to cut the building materials in batches at equal intervals in order to meet the requirements of people on different lengths of the same material required by the building, but the traditional cutting mode is manual cutting, the operator is required to measure the building materials once, and the cutting operation is carried out after the place needing to be cut is marked, the cutting mode is not accurate enough, if the cutting is carried out in batches, the cutting efficiency is low, the manpower is consumed, the cutting precision cannot be ensured, the labor intensity of workers is increased due to the low cutting efficiency, the construction period is prolonged, and the labor cost is increased, the inaccurate cutting can cause the quality of the finished building product to be unexpected, and once the building engineering is damaged in use, the damage to people can be caused.

(II) technical scheme

In order to achieve the purposes of assisting an operator to adjust the cutting distance of the building materials and improving the efficiency of the operator in cutting the building materials, the invention provides the following technical scheme: the utility model provides a building engineering is with cutting device convenient to adjust cutting interval, which comprises an outer shell, the inside swing joint of shell has the regulation cutting mechanism, it includes adjusting part to adjust cutting mechanism, the variable speed subassembly that carries out the spacing to adjusting part, the push assembly that carries out the propelling movement to adjusting part, the inside swing joint of shell has the propelling movement subassembly, variable speed subassembly swing joint is in the inside of push assembly, adjusting part swing joint is in the inside of push assembly, the outside swing joint of shell has the transmission trigger mechanism, the inside fixedly connected with external power source of shell, the outside fixedly connected with touch panel of shell.

Preferably, the propelling movement subassembly includes electric telescopic handle, push plate, spout, and the inside fixedly connected with electric telescopic handle of shell, push plate fixed connection is in electric telescopic handle's outside, and the spout is seted up in push plate's inside, and push plate sliding connection is in the inside of shell.

Preferably, the variable speed subassembly includes the gear wheel, the middle gear, the pinion, the turning block, Z shape pole, the electro-magnet, spacing iron, the torsional spring, the button, the internal rotation of propelling movement board is connected with the gear wheel, the external toothing of gear wheel has the middle gear, the external toothing of middle gear has the pinion, turning block fixed connection is in the outside of gear wheel, Z shape pole joint is in the inside of turning block, electro-magnet fixed connection is in the inside of propelling movement board, spacing iron rotates the inside of connecting at the propelling movement board, torsional spring swing joint is in the inside of spacing iron, button fixed connection is in the outside of shell, the middle gear, the pinion all rotates the inside of connecting at the shell, the gear wheel rotates the round and can make middle gear rotation two rings, middle gear rotation two rings can make the pinion rotate four rings.

Preferably, the adjusting part includes threaded rod, nut piece, cutting knife, slider, pointer, scale plate, and the internal rotation of pushing plate is connected with the threaded rod, and nut piece threaded connection is in the outside of threaded rod, and cutting knife fixed connection is in the outside of nut piece, and slider fixed connection is in the outside of cutting knife, and pointer fixed connection is in the outside of slider, and scale plate fixed connection is in the outside of pushing plate, and slider sliding connection is in the inside of spout.

Preferably, the adjusting assemblies are divided into three parts, namely a first adjusting assembly, a second adjusting assembly and a third adjusting assembly, and the first adjusting assembly, the second adjusting assembly and the third adjusting assembly are fixedly connected to the outer parts of the large gear, the middle gear and the small gear respectively.

Preferably, transmission trigger mechanism includes motor, transfer gear, conveyer belt, connects the material base, the contact, trigger the platform, the spring, the inside fixedly connected with motor of shell, transfer gear fixed connection is in the outside of motor, the conveyer belt transmission is connected in the outside of transfer gear, connect material base fixed connection in the outside of shell, contact fixed connection connects in the inside of connecing the material base, trigger platform sliding connection connects in the inside of connecing the material base, spring one end fixed connection connects in the inside of connecing the material base, spring other end fixed connection is in the outside of trigger the platform.

Preferably, the touch panel, the motor, the contact, the electromagnet and the button are all electrically connected with an external power supply, the button is electrically connected with the electromagnet, the motor is electrically connected with the touch panel and the contact, the contact receives three impacts, the external power supply stops supplying power to the motor, and the external power supply supplies power to the motor and runs after five seconds.

(III) advantageous effects

Compared with the prior art, the invention provides a cutting device for building engineering, which is convenient for adjusting the cutting distance and has the following beneficial effects:

1. this kind of building engineering is with cutting device convenient to adjust cutting interval, it rotates to drive the threaded rod through gear wheel rotation, the threaded rod rotates and drives the motion of nut piece, the motion of nut piece drives the cutting knife and the pointer motion of being connected with the cutting knife, make need not the operator and measurate building material and draw down the mark at the cutting point and cut again, through the pointer in the outside removal of scale plate, just can reach the effect that auxiliary operator carries out the regulation to the interval of building material cutting, further make this device accord with the technical theory that intelligent manufacturing, let the cutting more accurate, building finished product quality can be fine reach the expectation and can not take place the damage, safety to using building crowd is ensured.

2. This kind of building engineering is with cutting device convenient to adjust cutting interval, drive the cutting knife motion that push plate and push plate are connected through electric telescopic handle, make building material accomplished by the cutting knife cutting, the material that the rethread conveyer belt will cut is seen off, the material that the cutting is good drops and drives and trigger platform and contact collision cubic back, make the equal shut down of above-mentioned mechanism, just can reach the effect that improves operator cutting building material efficiency, make the efficiency of cutting building material improved, workman intensity of labour is alleviateed, the construction period can shorten, labour cost is reduced.

Drawings

FIG. 1 is a schematic side view in partial cross-section of the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1 according to the present invention;

FIG. 3 is an enlarged view of the structure at B in FIG. 1 according to the present invention;

fig. 4 is a schematic view of the inner structure of the pushing plate of the present invention.

In the figure: 1. a housing; 2. adjusting the cutting mechanism; 21. a push assembly; 211. an electric telescopic rod; 212. a push plate; 213. a chute; 22. a speed change assembly; 221. a bull gear; 222. a middle gear; 223. a pinion gear; 224. rotating the block; 225. a Z-shaped bar; 226. an electromagnet; 227. limiting iron; 228. a torsion spring; 229. a button; 23. an adjustment assembly; 231. a threaded rod; 232. a nut block; 233. a cutting knife; 234. a slider; 235. a pointer; 236. a scale plate; 3. a transmission trigger mechanism; 31. a motor; 32. a transfer wheel; 33. a conveyor belt; 34. a material receiving base; 35. a contact; 36. a trigger station; 37. a spring; 4. an external power supply; 5. a touch panel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

please refer to fig. 1, 2, 4, a cutting device for building engineering convenient for adjusting cutting distance, comprising a housing 1, an adjusting cutting mechanism 2 movably connected to the inside of the housing 1, the adjusting cutting mechanism 2 comprising an adjusting component 23, a speed changing component 22 for adjusting the distance of the adjusting component 23, a pushing component 21 for pushing the adjusting component 23, the inside of the housing 1 movably connected to the pushing component 21, the pushing component 21 comprising an electric telescopic rod 211, a pushing plate 212, a sliding chute 213, the inside of the housing 1 fixedly connected to the electric telescopic rod 211, the pushing plate 212 fixedly connected to the outside of the electric telescopic rod 211, the sliding chute 213 disposed inside the pushing plate 212, the pushing plate 212 slidably connected to the inside of the housing 1, the speed changing component 22 movably connected to the inside of the pushing component 21, the speed changing component 22 comprising a large gear 221, a middle gear 222, a small gear 223, a rotating block 224, a rotating block, Z shape pole 225, electro-magnet 226, spacing iron 227, torsional spring 228, button 229, the inside rotation of push plate 212 is connected with gear wheel 221, gear wheel 222 has been engaged to the outside of gear wheel 221, gear wheel 222 has pinion 223 in the outside engagement of gear wheel 222, turning block 224 fixed connection is in gear wheel 221's outside, Z shape pole 225 joint is in the inside of turning block 224, electro-magnet 226 fixed connection is in push plate 212's inside, spacing iron 227 rotates in push plate 212's inside, torsional spring 228 swing joint is in the inside of spacing iron 227, button 229 fixed connection is in the outside of shell 1, gear wheel 222, pinion 223 all rotates in the inside of shell 1, gear wheel 221 rotates and can make round gear wheel 222 rotate two circles, gear wheel 222 rotates two circles and can make pinion 223 rotate four circles.

The adjusting assembly 23 is movably connected inside the pushing assembly 21, the adjusting assembly 23 comprises a threaded rod 231, a nut block 232, a cutting knife 233, a sliding block 234, a pointer 235 and a scale plate 236, the threaded rod 231 is rotatably connected inside the pushing plate 212, the nut block 232 is in threaded connection with the outside of the threaded rod 231, the cutting knife 233 is fixedly connected with the outside of the nut block 232, the sliding block 234 is fixedly connected with the outside of the cutting knife 233, the pointer 235 is fixedly connected with the outside of the sliding block 234, the scale plate 236 is fixedly connected with the outside of the pushing plate 212, the sliding block 234 is in sliding connection with the inside of the sliding groove 213, the adjusting assembly 23 is divided into three parts, namely a first adjusting assembly 23, a second adjusting assembly 23 and a third adjusting assembly 23, the first adjusting assembly 23, the second adjusting assembly 23 and the third adjusting assembly 23 are respectively and fixedly connected with the outside of the large gear 221, the middle gear 222 and the small gear 223, the driving trigger mechanism 3 is movably connected outside the shell 1, the inside fixedly connected with external power source 4 of shell 1, the outside fixedly connected with touch panel 5 of shell 1, touch panel 5, motor 31, contact 35, electro-magnet 226, button 229 all are connected with external power source 4 electricity, button 229 is connected with electro-magnet 226 electricity, motor 31 is connected with touch panel 5, contact 35 electricity, after contact 35 received the cubic striking, external power source 4 can stop to supply power for motor 31, external power source 4 supplies power for motor 31 and operates and carry out after five seconds.

Example two:

referring to fig. 1-4, a cutting device for building engineering convenient to adjust cutting interval comprises a housing 1, an adjusting cutting mechanism 2 is movably connected inside the housing 1, the adjusting cutting mechanism 2 comprises an adjusting component 23, a speed changing component 22 for adjusting interval of the adjusting component 23, a pushing component 21 for pushing the adjusting component 23, the pushing component 21 is movably connected inside the housing 1 and comprises an electric telescopic rod 211, a pushing plate 212 and a sliding groove 213, the electric telescopic rod 211 is fixedly connected inside the housing 1, the pushing plate 212 is fixedly connected outside the electric telescopic rod 211, the sliding groove 213 is arranged inside the pushing plate 212, the pushing plate 212 is slidably connected inside the housing 1, the speed changing component 22 is movably connected inside the pushing component 21, the speed changing component 22 comprises a large gear 221, a middle gear 222, a small gear 223, a rotating block 224, a rotating block, The Z-shaped rod 225, the electromagnet 226, the limiting iron 227, the torsion spring 228 and the button 229 are connected to the inside of the pushing plate 212 in a rotating mode, the large gear 221 is meshed with the middle gear 222 on the outside, the small gear 223 is meshed with the outside of the middle gear 222, the rotating block 224 is fixedly connected to the outside of the large gear 221, the Z-shaped rod 225 is clamped inside the rotating block 224, the electromagnet 226 is fixedly connected to the inside of the pushing plate 212, the limiting iron 227 is rotatably connected to the inside of the pushing plate 212, the torsion spring 228 is movably connected to the inside of the limiting iron 227, the button 229 is fixedly connected to the outside of the shell 1, the middle gear 222 and the small gear 223 are both rotatably connected to the inside of the shell 1, the large gear 221 rotates to enable the middle gear 222 to rotate for two circles, the middle gear 222 rotates for two circles to enable the small gear 223 to rotate for four circles, the adjusting assembly 23 is movably connected to the inside of the pushing assembly 21, and the adjusting assembly 23 comprises a threaded rod 231, Nut piece 232, cutting knife 233, slider 234, pointer 235, scale plate 236, the internal rotation of push plate 212 is connected with threaded rod 231, nut piece 232 threaded connection is in the outside of threaded rod 231, cutting knife 233 fixed connection is in the outside of nut piece 232, slider 234 fixed connection is in the outside of cutting knife 233, pointer 235 fixed connection is in the outside of slider 234, scale plate 236 fixed connection is in the outside of push plate 212, slider 234 sliding connection is in the inside of spout 213, adjusting part 23 has three and divide into first adjusting part 23, second adjusting part 23, third adjusting part 23, first adjusting part 23, second adjusting part 23, third adjusting part 23 is fixed connection at gear wheel 221 respectively, well gear 222, the outside of pinion 223.

The external part of the shell 1 is movably connected with a transmission trigger mechanism 3, the transmission trigger mechanism 3 comprises a motor 31, a transmission wheel 32, a transmission belt 33, a material receiving base 34, a contact 35, a trigger table 36 and a spring 37, the internal part of the shell 1 is fixedly connected with the motor 31, the transmission wheel 32 is fixedly connected with the external part of the motor 31, the transmission belt 33 is in transmission connection with the external part of the transmission wheel 32, the material receiving base 34 is fixedly connected with the external part of the shell 1, the contact 35 is fixedly connected with the internal part of the material receiving base 34, the trigger table 36 is in sliding connection with the internal part of the material receiving base 34, one end of the spring 37 is fixedly connected with the internal part of the material receiving base 34, the other end of the spring 37 is fixedly connected with the external power supply 4, the external part of the shell 1 is fixedly connected with a touch panel 5, the motor 31, the contact 35, the electromagnet 226 and the button 229 are all electrically connected with the external power supply 4, the button 229 is electrically connected with the electromagnet 226, the motor 31 is electrically connected with the touch panel 5 and the contact 35, after the contact 35 receives three times of impacts, the external power source 4 stops supplying power to the motor 31, and the external power source 4 supplies power to the motor 31 and operates after five seconds.

The working principle is as follows: an operator presses a button 229, at the moment, an external power supply 4 supplies power to an electromagnet 226, the electromagnet 226 is electrified to magnetically attract a limiting iron 227 to rotate and compress a torsion spring 228, the limiting iron 227 rotates to enable the movement of a rotating block 224 not to be limited, the operator rotates a Z-shaped rod 225, the Z-shaped rod 225 rotates to drive the rotating block 224 to rotate, the rotating block 224 rotates to drive a large gear 221 to rotate, the large gear 221 rotates to drive a threaded rod 231 in a first adjusting assembly 23 to rotate, the threaded rod 231 rotates to drive a nut block 232 to slide, the nut block 232 slides to drive a cutting knife 233 to slide, the cutting knife 233 slides to drive a sliding block 234 to slide, the sliding block 234 slides to drive a pointer 235 to move, meanwhile, the large gear 221 rotates to drive a middle gear 222, the middle gear 222 rotates to drive a threaded rod 231 in a second adjusting assembly 23 to rotate, the threaded rod 231 rotates to cause the cutting knife 233 to slide, and the middle gear 222 rotates to drive the small gear 223 to rotate, pinion 223 rotates the threaded rod 231 that drives in the third adjusting part 23 and rotates, and threaded rod 231 rotates and makes the cutting knife 233 slide with the same reason, because gear wheel 221 rotates the round and can make well gear 222 rotate two rings, well gear 222 rotates two rings and can make pinion 223 rotate four rings, so cutting knife 233 movement distance ratio in first adjusting part 23, second adjusting part 23, the third adjusting part 23 is three: II, secondly: one, the first step.

Meanwhile, when the pointer 235 moves, an operator observes the scale of the scale plate 236, when the pointer 235 moves to the position corresponding to the scale required by the operator, the operator stops rotating the Z-shaped rod 225, presses the button 229 again, at this time, the external power supply 4 does not supply power to the electromagnet 226 any more and drives the limiting iron 227 to reset under the resilience force of the torsion spring 228, the limiting iron 227 resets to limit the movement of the rotating block 224 again,

at this time, an operator places the building material to be cut outside the conveyor belt 33, and steps down the touch panel 5 with feet, at this time, the external power source 4 supplies power to the electric telescopic rod 211 and the motor 31, the electric telescopic rod 211 stretches and contracts once and drives the push plate 212 to stretch and contract, the push plate 212 stretches and contracts and drives the cutting knife 233 to stretch and contract, the cutting knife 233 stretches and contract to cut the building material at equal intervals, five seconds later, the motor 31 runs and drives the conveyor wheel 32 to rotate, the conveyor wheel 32 rotates and drives the conveyor belt 33 to move, the conveyor belt 33 moves and enables the cut building material to fall outside the trigger table 36 under the action of gravity, the trigger table 36 moves under the action of the gravity and enables the spring 37 to be compressed, the trigger table 36 moves to contact with the contact 35, the operator takes away the cut building material, the trigger table 36 resets under the action of the resilience force of the spring 37, and after the contact 35 receives three impacts, at this time, the external power source 4 stops supplying power to the motor 31, and the motor 31 stops operating, which causes the above mechanisms to stop moving.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.