CN113074707B

CN113074707B - On-spot mapping equipment of building engineering cost

Info

Publication number: CN113074707B
Application number: CN202110447956.6A
Authority: CN
Inventors: 刘晔
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2022-07-12
Anticipated expiration: 2041-04-25
Also published as: CN113074707A

Abstract

The invention discloses a construction engineering cost on-site surveying and mapping device, which structurally comprises a portable plate, a surveying and mapping host, a display and a stabilizing mechanism, wherein the lower end of the portable plate is fixed with the top of the surveying and mapping host, a sliding ball slides on a guide rod, a rotating rod automatically blocks after rotating for 180 degrees through the limit of a limit sliding frame, a supporting sheet supports a telescope in the horizontal direction to ensure that the telescope is still in the horizontal angle after rotating, measurement targets in different directions are detected, the measurement accuracy of the telescope is improved, the sliding blocking ball smoothly slides on the sliding rod, the blocking plate and the sliding blocking ball fixedly block to position the rotated telescope, the deviation of the angle of the telescope in the measurement process is avoided, a swinging plate swings left and right on the positioning ball to enable a support rod to be always in the vertical direction, and the accuracy of the telescope in the horizontal direction is improved, the telescope is prevented from being inclined at an angle during measurement.

Description

On-spot mapping equipment of building engineering cost

Technical Field

The invention relates to the field of construction cost of construction engineering, in particular to a construction cost field mapping device.

Background

The construction engineering cost field survey needs to use the electronic theodolite to measure the horizontal angle and the vertical angle on the spot, when in measurement, the theodolite is arranged on a tripod, the center of the instrument is aligned to a ground survey station by a plumb ball or an optical plummet, the instrument is leveled by the leveling instrument, a telescope is used for aiming at a measurement target, a horizontal dial and a vertical dial are used for measuring the horizontal angle and the vertical angle, but when in measurement, the electronic theodolite is directly arranged on the tripod, the tripod needs to be stabilized with the ground, when a plurality of measurement targets are needed, the tripod needs to be moved for azimuth adjustment, the tripod and the ground support need to be stabilized again after being moved, the operation is complicated, and the tripod and the electronic theodolite are easy to shake and deviate, so that the telescope on the electronic theodolite has certain deviation when aiming at the measurement target, reducing the accuracy of the measurement.

Disclosure of Invention

The technical scheme adopted by the invention for realizing the technical purpose is as follows: this on-spot mapping equipment of building engineering cost, its structure includes portable board, survey and drawing host computer, display, steady mechanism, the portable board lower extreme is fixed mutually with survey and drawing host computer top, survey and drawing host computer front surface lower extreme fixed mounting has the display to survey and drawing host computer bottom is equipped with steady mechanism, the survey and drawing host computer includes supporting mechanism, telescope, collet mechanism, the supporting mechanism inboard is connected with the telescope to the supporting mechanism lower extreme upper surface is fixed mutually with collet mechanism lower extreme, the supporting mechanism bottom is equipped with steady mechanism, collet mechanism top is inconsistent with the telescope.

As a further improvement of the invention, the supporting mechanism comprises a supporting frame, a limiting rotation mechanism, a sealing plate, four rotation shafts and guide rods, wherein a stabilizing mechanism is arranged at the bottom of the supporting frame, the limiting rotation mechanism is arranged inside the supporting frame and fixed with the telescope, the limiting rotation mechanism penetrates through the sealing plate, the sealing plate is abutted against the inner side surface of the supporting frame, the rotation shafts are arranged on the inner side surface of the sealing plate and are slidably mounted on the guide rods, the guide rods are fixedly mounted inside the supporting frame, the upper surface of the lower end of the supporting frame is fixed with the lower end of the bottom support mechanism, and the four rotation shafts are equidistantly distributed on the guide rods of the annular structure.

As a further improvement of the invention, the limiting rotating mechanism comprises a rotating rod, a limiting sliding frame, a sliding ball and a guide rod, wherein the front end of the rotating rod is fixed with the telescope, the rotating rod is positioned at the lower end of the middle part of the limiting sliding frame, the sliding ball is arranged at the left end of the rotating rod, the outer side of the sliding ball is abutted against the inner wall of the limiting sliding frame, the guide rod is fixedly arranged in the limiting sliding frame, the guide rod penetrates through the sliding ball in a clearance fit manner, the limiting sliding frame is in an arc arched door type structure, and the lower ends of the left side and the right side are provided with round chamfers.

As a further improvement of the telescopic telescope, the bottom support mechanism comprises a fixed pipe sleeve, a pressure spring, an extrusion rod and a supporting sheet, the lower end of the fixed pipe sleeve is fixed with the upper surface of the lower end of the supporting frame, the pressure spring is arranged at the upper end inside the fixed pipe sleeve, the bottom of the extrusion rod is welded with the upper end of the pressure spring, the lower end of the extrusion rod is arranged inside the upper end of the fixed pipe sleeve in a clearance fit mode, the supporting sheet is arranged at the upper end of the extrusion rod, the upper surface of the supporting sheet is abutted to the telescope, the upper end of the supporting sheet is of a cambered surface structure, the radian of the supporting sheet is matched with that of a lens of the telescope, and a sponge cushion is further arranged on the upper end surface of the supporting sheet.

As a further improvement of the invention, the stabilizing mechanism comprises a supporting plate, an anti-shaking mechanism, four buffer rods and a clamping and rotating mechanism, wherein the supporting plate is arranged at the bottom of the supporting frame, the anti-shaking mechanism is arranged at the lower end of the supporting plate, the upper ends of the buffer rods are arranged in the lower end of the anti-shaking mechanism in a clearance fit manner, the buffer rods are arranged at the upper end of the clamping and rotating mechanism, and the four buffer rods are distributed in four directions between the anti-shaking mechanism and the clamping and rotating mechanism.

As a further improvement of the invention, the anti-shaking mechanism comprises a limiting frame, a support rod, a positioning ball and a swing plate, wherein the support rod penetrates through the inner part of the upper end of the limiting frame in a clearance fit manner, the top of the support rod is fixed with the middle end of the bottom of the support plate, the positioning ball is welded at the lower end of the support rod, the positioning ball is installed at the center of the inner part of the swing plate in a clearance fit manner, the outer side end of the swing plate is connected with the inner wall of the limiting frame in a sliding manner, the bottom of the swing plate is fixed with the top of the buffer rod, the upper end of the buffer rod is installed in the inner part of the lower end of the limiting frame in a clearance fit manner, an arc-shaped rod is further arranged at the connection part of the support rod and the upper end of the swing plate, and the circle center of the arc-shaped rod and the positioning ball are positioned on the same point.

The clamping rotating mechanism comprises a chassis, sliding clamping balls, sliding rods and clamping plates, wherein the sliding clamping balls are arranged inside the chassis, the tops of the sliding clamping balls are fixed with the lower ends of buffer rods, the bottoms of the buffer rods are located on the upper end face of the chassis, the sliding clamping balls are slidably mounted on the sliding rods, the clamping plates are arranged on the inner wall of the chassis and are connected with the sliding clamping balls in a clamping mode, the number of the sliding clamping balls is four, iron sheets are arranged on the outer side surfaces of the sliding clamping balls, the sliding rods are of a ring-shaped structure, the four sliding clamping balls are fixed with the lower ends of the four buffer rods respectively, one side, close to the sliding clamping balls, of each clamping plate is of an arc-shaped structure, and rubber magnetic sheets are arranged on the arc-shaped structure.

The invention has the beneficial effects that:

1. through rotating the telescope, at this moment the bull stick rotates, the ball slides on the guide arm, spacing through spacing sliding frame for the bull stick rotates 180 automatic screens in back, the telescope after rotating simultaneously pushes down the support piece, carry out the support in horizontal position to the telescope, ensure still to be in horizontal angle after the telescope rotates, under the prerequisite that need not remove the tripod, detect the measuring target in different positions, improve the telescope measuring degree of accuracy simultaneously.

2. The slip card ball carries out smooth and easy slip on the slide bar, carry out the horizontal angle rotation to the telescope, fix the screens through screens board and slip card ball, thereby the telescope after will rotating is fixed a position, avoid telescope angle to take place the skew among the measurement process, the buffer beam changes at the in-process length that carries out the buffering, the wobble plate carries out the horizontal hunting on the location ball, make branch be in vertical position all the time, improve the accuracy that the telescope is in horizontal position, avoid the telescope to take place the angle slope when measuring.

Drawings

FIG. 1 is a schematic structural diagram of a construction project cost on-site surveying and mapping apparatus of the present invention.

Fig. 2 is a schematic top view of a surveying and mapping mainframe according to the present invention.

FIG. 3 is a side view, an internal perspective view, and a partially enlarged structural view of a supporting mechanism of the present invention.

Fig. 4 is a schematic perspective view of a rotation limiting mechanism according to the present invention.

Fig. 5 is a schematic view of the internal structure of a shoe mechanism of the present invention.

Fig. 6 is a schematic structural diagram of a smoothing mechanism according to the present invention.

Fig. 7 is a schematic view of the internal structure of an anti-sloshing mechanism of the present invention.

Fig. 8 is a schematic top view of an internal structure of a clamping rotation mechanism according to the present invention.

In the figure: a portable plate-1, a surveying and mapping host machine-2, a display-3, a stabilizing mechanism-4, a supporting mechanism-21, a telescope-22, a bottom support mechanism-23, a supporting frame-211, a limiting rotating mechanism-213, a sealing plate-212, a rotating shaft-214, a guide rod-215, a rotating rod-13 a, a limiting sliding frame-13 b, a sliding ball-13 c, a guide rod-13 d, a fixed pipe sleeve-231, a pressure spring-232, an extrusion rod-233, a supporting sheet-234, a supporting plate-41, an anti-shaking mechanism-42, a buffer rod-43, a clamping rotating mechanism-44, a limiting frame-421, a supporting rod-422, a positioning ball-423, a swinging plate-424, a chassis-44 a, a sliding clamping ball-44 b, a sliding rod-44 c, a positioning ball-44 b, a positioning ball-43, a positioning mechanism, A blocking plate-44 d.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

example 1:

as shown in figures 1 to 5:

the invention relates to on-site surveying and mapping equipment for construction engineering cost, which structurally comprises a hand-held plate 1, a surveying and mapping host machine 2, a display 3 and a stabilizing mechanism 4, wherein the lower end of the hand-held plate 1 is fixed with the top of the surveying and mapping host machine 2, the display 3 is fixedly arranged at the lower end of the front surface of the surveying and mapping host machine 2, the stabilizing mechanism 4 is arranged at the bottom of the surveying and mapping host machine 2, the surveying and mapping host machine 2 comprises a supporting mechanism 21, a telescope 22 and a collet mechanism 23, the inner side of the supporting mechanism 21 is connected with the telescope 22, the upper surface of the lower end of the supporting mechanism 21 is fixed with the lower end of the collet mechanism 23, the stabilizing mechanism 4 is arranged at the bottom of the supporting mechanism 21, and the top of the collet mechanism 23 is abutted against the telescope 22.

Wherein, the supporting mechanism 21 comprises a supporting frame 211, a limit rotating mechanism 213, a sealing plate 212, a rotating shaft 214, and a guiding rod 215, the bottom of the supporting frame 211 is provided with a stabilizing mechanism 4, the limit rotating mechanism 213 is arranged inside the supporting frame 211, the limit rotating mechanism 213 is fixed with the telescope 22, the limit rotating mechanism 213 penetrates inside the sealing plate 212, the sealing plate 212 abuts against the inner side surface of the supporting frame 211, the rotating shaft 214 is arranged on the inner side surface of the sealing plate 212, the rotating shaft 214 is slidably mounted on the guiding rod 215, the guiding rod 215 is fixedly mounted inside the supporting frame 211, the upper surface of the lower end of the supporting frame 211 is fixed with the lower end of the bottom mounting mechanism 23, the number of the rotating shafts 214 is four, and the rotating shafts 214 are equidistantly distributed on the annular guiding rod 215, which is beneficial for the rotating shaft 214 to rotate on the guiding rod 215, therefore, the sealing plate 212 is attached to the supporting frame 211 to rotate, the sealing performance between the supporting frame 211 and the limiting rotating mechanism 213 is improved, dust on a surveying and mapping site is prevented from entering the limiting rotating mechanism 213, and the limiting rotating mechanism 213 is ensured to rotate smoothly.

Wherein, the limit rotating mechanism 213 comprises a rotating rod 13a, a limit sliding frame 13b, a sliding ball 13c and a guide rod 13d, the front end of the rotating rod 13a is fixed with the telescope 22, and the rotating rod 13a is positioned at the lower end of the middle part of the limiting sliding frame 13b, the left end of the rotating rod 13a is provided with a sliding ball 13c, the outer side of the sliding ball 13c is pressed against the inner wall of the limiting sliding frame 13b, the guide rod 13d is fixedly arranged inside the limiting sliding frame 13b, the guide rod 13d penetrates through the inside of the sliding ball 13c in a clearance fit manner, the limiting sliding frame 13b is of an arc-arched structure, and the lower ends of the left side and the right side are provided with round chamfers, which is beneficial to the sliding ball 13c to stop at the lower end of the limiting sliding frame 13b, therefore, the rotating rod 13a rotates one hundred eighty degrees inside the limiting sliding frame 13b, the telescope 22 is kept on a horizontal line after rotation adjustment, and the angle of the telescope 22 after rotation is prevented from deviating.

The collet mechanism 23 includes a fixed pipe sleeve 231, a pressure spring 232, an extrusion rod 233 and a supporting sheet 234, the lower end of the fixed pipe sleeve 231 is fixed to the upper surface of the lower end of the supporting frame 211, the pressure spring 232 is arranged at the upper end inside the fixed pipe sleeve 231, the bottom of the extrusion rod 233 is welded to the upper end of the pressure spring 232, the lower end of the extrusion rod 233 is arranged inside the upper end of the fixed pipe sleeve 231 in a clearance fit mode, the supporting sheet 234 is arranged at the upper end of the extrusion rod 233, the upper surface of the supporting sheet 234 is abutted to the telescope 22, the upper end of the supporting sheet 234 is of an arc structure, the radian of the arc structure is matched with the radian of a lens of the telescope 22, and the upper end face of the supporting sheet 234 is further provided with a sponge cushion, so that the telescope 22 can be supported after being rotated, the telescope 22 can be ensured to be at a horizontal angle, and meanwhile, the telescope 22 can be protected by buffering.

The specific use mode and function of the embodiment are as follows:

in the invention, a tripod is placed on the ground, the bottom of a stabilizing mechanism 4 is clamped and connected with the top of the tripod, then a measuring target is aimed through a telescope 22, a horizontal angle and a vertical angle are measured through a horizontal dial and a vertical dial, data are displayed through a display 3, when a plurality of measuring targets in different directions are measured, the telescope 22 can be rotated, at the moment, a rotating rod 13a rotates to drive a sealing plate 212 to rotate, the rotating rod 214 rotates in a ring shape on a guide rod 215, so that tight interference between the sealing plate 212 and a supporting frame 211 is ensured, dust on a surveying and mapping site is prevented from entering the limiting and rotating mechanism 213, the limiting and rotating mechanism 213 is ensured to rotate smoothly, then the sliding ball 13c slides on a guide rod 13d, and the rotating rod 13a automatically blocks after rotating for 180 degrees through the limiting of a limiting and sliding frame 13b, meanwhile, the rotating telescope 22 presses the supporting sheet 234 downwards, the pressing spring 232 is pressed through the pressing rod 233, and the supporting sheet 234 supports the telescope 22 in the horizontal direction, so that the telescope 22 is ensured to be still at the horizontal angle after rotating, measurement targets in different directions are detected on the premise that the tripod does not need to be moved, and the measurement accuracy of the telescope 22 is improved.

Example 2:

as shown in fig. 6 to 8:

the stabilizing mechanism 4 comprises a supporting plate 41, an anti-shaking mechanism 42, a buffer rod 43 and a clamping rotating mechanism 44, wherein the supporting plate 41 is arranged at the bottom of the supporting frame 211, the anti-shaking mechanism 42 is arranged at the lower end of the supporting plate 41, the upper end of the buffer rod 43 is arranged inside the lower end of the anti-shaking mechanism 42 in a clearance fit manner, the buffer rod 43 is arranged at the upper end of the clamping rotating mechanism 44, the buffer rods 43 are four in number and are distributed on four positions between the anti-shaking mechanism 42 and the clamping rotating mechanism 44, the stability between the anti-shaking mechanism 42 and the clamping rotating mechanism 44 is improved, and the generation of large shaking during horizontal angle rotation of the supporting frame 211 is avoided.

Wherein, the anti-shaking mechanism 42 comprises a limit frame 421, a support rod 422, a positioning ball 423 and a swing plate 424, the support rod 422 penetrates through the inside of the upper end of the limit frame 421 in a clearance fit manner, the top of the support rod 422 is fixed with the middle end of the bottom of the support plate 41, the positioning ball 423 is welded at the lower end of the support rod 422, the positioning ball 423 is installed at the center of the inside of the swing plate 424 in a clearance fit manner, the outer side end of the swing plate 424 is connected with the inner wall of the limit frame 421 in a sliding manner, the bottom of the swing plate 424 is fixed with the top of the buffer rod 43, the upper end of the buffer rod 43 is installed inside the lower end of the limit frame 421 in a clearance fit manner, an arc rod is further arranged at the connection position between the support rod 422 and the inside of the upper end of the swing plate 424, the circle center of the arc rod and the positioning ball 423 are located at the same point, so as to ensure that the support rod 422 keeps the vertical direction of the support plate 41 at the upper end of the support rod 422 and the support frame 211 to keep a vertical angle, avoiding the occurrence of angular tilting.

The clamping rotation mechanism 44 comprises a base plate 44a, sliding clamping balls 44b, sliding rods 44c and a clamping plate 44d, wherein the sliding clamping balls 44b are arranged inside the base plate 44a, the tops of the sliding clamping balls 44b are fixed with the lower end of the buffer rod 43, the bottom of the buffer rod 43 is positioned on the upper end surface of the base plate 44a, the sliding clamping balls 44b are slidably mounted on the sliding rods 44c, the clamping plate 44d is arranged on the inner wall of the base plate 44a, the clamping plate 44d is connected with the sliding clamping balls 44b in a clamping manner, the number of the sliding clamping balls 44b is four, iron sheets are arranged on the outer side surface of the sliding clamping balls 44b, the sliding rods 44c are of a ring structure, the four sliding clamping balls 44b are respectively fixed with the lower ends of the four buffer rods 43, the sliding clamping balls 44b can rotate on the sliding rods 44c, so that the buffer rod 43 is driven to rotate without moving the tripod, and the measured transverse orientation can be adjusted rotationally, screens board 44d is close to slip card ball 44b one side and is the arc structure to the structural rubber magnetic sheet that is equipped with of arc does benefit to and carries out the magnetism screens to slip card ball 44b after rotating, and the angle changes when avoiding rotating the back and measuring.

The specific use mode and function of the embodiment are as follows:

in the invention, in the process of measurement, a tripod is not required to be moved, the buffer rod 43 is rotated, so that the sliding clamping ball 44b slides smoothly on the sliding rod 44c, the telescope 22 rotates horizontally, the clamping plate 44d and the sliding clamping ball 44b are fixedly clamped, so that the rotated telescope 22 is positioned, the angular deviation of the telescope 22 in the measurement process is avoided, the buffer rod 43 buffers the space between the anti-shaking mechanism 42 and the base plate 44a during rotation, the telescope 22 arranged on the rear supporting disc 41 of the base plate 44a on the tripod is avoided from shaking, the length of the buffer rod 43 is changed in the buffering process, the swinging plate 424 swings left and right on the positioning ball 423 through the positioning of the positioning ball 423, and the positioning ball 423 keeps the positioning, so that the supporting rod 422 is always in a vertical position, the support plate 41 is vertically supported, so that the accuracy of the telescope 22 in the horizontal direction is improved, and the telescope 22 is prevented from being inclined at an angle during measurement.

The technical solutions of the present invention or similar technical solutions designed by those skilled in the art based on the teachings of the technical solutions of the present invention are all within the scope of the present invention to achieve the above technical effects.

Claims

1. The utility model provides an on-spot mapping equipment of building engineering cost, its structure includes portable board (1), survey and drawing host computer (2), display (3), steady mechanism (4), portable board (1) lower extreme is fixed mutually with survey and drawing host computer (2) top, survey and drawing host computer (2) front surface lower extreme fixed mounting has display (3) to survey and drawing host computer (2) bottom is equipped with steady mechanism (4), its characterized in that:

the surveying and mapping host (2) comprises a supporting mechanism (21), a telescope (22) and a bottom support mechanism (23), wherein the inner side of the supporting mechanism (21) is connected with the telescope (22), the upper surface of the lower end of the supporting mechanism (21) is fixed with the lower end of the bottom support mechanism (23), a stabilizing mechanism (4) is arranged at the bottom of the supporting mechanism (21), and the top of the bottom support mechanism (23) is abutted against the telescope (22);

the supporting mechanism (21) comprises a supporting frame (211), a limiting rotating mechanism (213), a sealing plate (212), a rotating shaft (214) and a guide rod (215), the bottom of the supporting frame (211) is provided with a stabilizing mechanism (4), a limiting rotating mechanism (213) is arranged in the supporting frame (211), the limiting rotating mechanism (213) is fixed with the telescope (22), the limiting rotating mechanism (213) penetrates through the sealing plate (212), and the sealing plate (212) is contacted with the inner side surface of the supporting frame (211), the inner side surface of the sealing plate (212) is provided with a rotating shaft (214), and the rotating shaft (214) is slidably mounted on a guide rod (215), the guide rod (215) is fixedly mounted inside the supporting frame (211), the upper surface of the lower end of the supporting frame (211) is fixed with the lower end of the bottom support mechanism (23).

2. A construction cost on-site surveying apparatus according to claim 1, characterized in that: spacing slewing mechanism (213) are including bull stick (13 a), spacing sliding frame (13 b), ball (13 c), guide arm (13 d), bull stick (13 a) front end is fixed mutually with telescope (22) to bull stick (13 a) are located spacing sliding frame (13 b) middle part lower extreme, bull stick (13 a) left end is equipped with ball (13 c) to ball (13 c) outside and spacing sliding frame (13 b) inner wall are inconsistent, guide arm (13 d) fixed mounting is inside spacing sliding frame (13 b), guide arm (13 d) adopt clearance fit to run through inside ball (13 c).

3. A construction cost on-site surveying apparatus according to claim 1, characterized in that: collet mechanism (23) is including fixed pipe box (231), pressure spring (232), extrusion stem (233), support piece (234), fixed pipe box (231) lower extreme is fixed mutually with braced frame (211) lower extreme upper surface to pressure spring (232) are established in fixed pipe box (231) inside upper end, extrusion stem (233) bottom welds mutually with pressure spring (232) upper end, extrusion stem (233) lower extreme adopts clearance fit to install inside fixed pipe box (231) upper end, extrusion stem (233) upper end is equipped with support piece (234) to support piece (234) upper surface and telescope (22) inconsistent.

4. A construction cost on-site surveying apparatus according to claim 1, characterized in that: steady mechanism (4) are including supporting disk (41), prevent shaking mechanism (42), buffer beam (43), screens rotary mechanism (44), establish in braced frame (211) bottom supporting disk (41) to prevent shaking mechanism (42) and install at supporting disk (41) lower extreme, buffer beam (43) upper end adopts clearance fit to install and prevents shaking inside mechanism (42) lower extreme, buffer beam (43) are established in screens rotary mechanism (44) upper end.

5. The construction cost on-site surveying and mapping apparatus of claim 4, wherein: prevent shaking mechanism (42) including spacing frame (421), branch (422), location ball (423), pendulum board (424), branch (422) adopt clearance fit to run through in spacing frame (421) upper end inside to branch (422) top is fixed mutually with supporting disk (41) bottom middle-end, location ball (423) weld in branch (422) lower extreme, location ball (423) adopt clearance fit to install at pendulum board (424) inside center, pendulum board (424) outside end and spacing frame (421) inner wall sliding connection, pendulum board (424) bottom is fixed mutually with buffer beam (43) top to buffer beam (43) upper end adopts clearance fit to install inside spacing frame (421) lower extreme.

6. The construction cost on-site surveying and mapping apparatus of claim 4, wherein: screens rotary mechanism (44) include chassis (44 a), slip card ball (44 b), slide bar (44 c), screens board (44 d), chassis (44 a) inside is equipped with slip card ball (44 b) to slip card ball (44 b) top is fixed mutually with buffer beam (43) lower extreme, buffer beam (43) bottom is located chassis (44 a) up end, slip card ball (44 b) slidable mounting is on slide bar (44 c), screens board (44 d) are established in chassis (44 a) inner wall to screens board (44 d) are connected with slip card ball (44 b) block.