CN215294217U - Pitching adjusting mechanism of calculator for engineering cost - Google Patents

Abstract

The utility model provides a pitching adjusting mechanism of a calculator for engineering cost, which is characterized by comprising a base plate, a bottom plate, a lifting structure, a pitching adjusting structure and a locking and fixing structure; bottom plates are welded at the left end and the right end of the substrate respectively; the upper side of the substrate is provided with a lifting structure; the top of the lifting structure is provided with a pitching adjusting structure; a locking and fixing structure is arranged in the pitching adjusting structure; through the lifting structure, the problem that the height difference exists among the workers using the utility model is solved, so that the workers can adjust the engineering cost computer to the most appropriate viewing height more conveniently, the cervical vertebra health of the workers is more facilitated, and the working efficiency is improved; through locking fixed knot structure, make engineering cost computer install the utility model discloses the time adjust more stability, avoid appearing the problem that engineering cost computer dropped, also avoided appearing great economic loss simultaneously.

Description

Pitching adjusting mechanism of calculator for engineering cost

Technical Field

The utility model relates to a calculator technical field for the engineering cost especially relates to a every single move adjustment mechanism of calculator for engineering cost.

Background

The development of computer network technology, its powerful data processing function, computing function, communication function and software function, etc. have important role in engineering cost, with the development of building industry, the prices of many materials and labor cost, etc. need to be updated, the engineering cost can process information quantity, the efficiency will be affected by only depending on manpower solution, increasingly complicated data information can not be regulated in time, therefore, the computer is indispensable in the aspect of engineering cost, the computer becomes an important communication tool nowadays, in the aspect of project cost, the verification of the project amount is required, the communication between an auditor and a party A and a party B is required, information of each stage can be visually, vividly and economically displayed on a computer, the corresponding data information can be sorted and input by using a computer, so that the data information can be stored for a longer time, and the data information has a good reference effect on the manufacturing cost of similar projects;

the computer applied in the engineering cost field at present usually needs the long-time use of the staff and observes, and the computer that engineering cost used is mostly a box, opens the latter part is the display screen of the computer, and the other part is the operation panel of the computer, the staff often need to adjust the display screen to a more comfortable angle when using, in order to carry on the long-time calculation work, the traditional engineering cost computer need to put on the desktop of the fixed height when using, and open certain angle, and the high reproduction of the present computer working platform is mostly the uniform fixed angle, when the staff puts the engineering cost computer on the platform, in the use process, no matter what angle the computer display screen and the operation panel are in, the staff need to lower the head to obtain the better viewing angle, the long-time head lowering work can greatly affect the cervical vertebra health of workers and accelerate the fatigue speed of the workers, so that the prior art provides a special pitching adjusting bracket for a computer, the special pitching adjusting bracket for the computer is used for adjusting the pitching angle by raising a computer main body and connecting a placing plate and a rotating shaft with the bracket, the defect that the workers need to lower heads to use the computer in the traditional mode is overcome, the vertical height of the computer is improved, the workers can level up the display screen of the computer, and a better viewing angle is obtained in a pitching adjusting mode; however, the height of the computer overhead cannot be adjusted by the pitching adjustment support in the prior art, and due to the height difference of workers, the fixed overhead height in the prior art can cause the problem that some people with higher or lower heights are not suitable for use; the angle positioning mode of the pitching adjusting support is mostly to perform positioning by using the damping effect of a rotating shaft, or to form triangular support positioning by using a folding support and a bottom support, and the positioning mode after the angle adjustment is unstable and is easy to deviate; the pitching adjusting support in the prior art directly places a computer for engineering cost on a placing plate when in use, a stop block is installed at the front end of the placing plate and used for supporting the front side of the computer, and a non-slip mat is arranged on the surface of the placing plate and used for simply fixing the computer.

Disclosure of Invention

According to the technical problem, the utility model provides a pitching adjusting mechanism of a calculator for engineering cost, which is characterized in that the pitching adjusting mechanism comprises a base plate, a bottom plate, a lifting structure, a pitching adjusting structure and a locking and fixing structure; bottom plates are welded at the left end and the right end of the substrate respectively; the upper side of the substrate is provided with a lifting structure; the top of the lifting structure is provided with a pitching adjusting structure; a locking and fixing structure is arranged in the pitching adjusting structure;

the lifting structure consists of a lifting cylinder, a lifting rod, a guide sleeve, a buffer spring, a top plate, a supporting plate, a guide rail rod and a spring pin, wherein the lifting cylinder is welded at the top of the base plate; the outer side wall of the lifting cylinder is provided with an adjusting hole; the number of the adjusting holes is N, and N is more than or equal to 2; a lifting rod is arranged inside the lifting cylinder; the outer side wall of the lifting rod is provided with a mounting groove, and a spring pin is mounted inside the mounting groove; the spring pin is matched with the adjusting hole for use; the tops of the two bottom plates are respectively provided with a guide sleeve; one end of a buffer spring is welded at the bottom of the interior of the guide sleeve; a top plate is welded at the other end of the buffer spring; one end of a supporting plate is welded on the outer side wall of the guide sleeve; the other end of the supporting plate is welded on the top of the bottom plate; the number of the supporting plates is four; a guide rail rod is arranged inside the guide sleeve;

the pitching adjusting structure consists of a bearing, an installation block, a rotating plate, a matching block, an adjusting box, an adjusting disc, a limiting rod, a locking box body, a spring plate, a locking spring, a pull ring block and a connecting shaft; the top of the lifting rod is provided with an inner ring of a bearing; the outer ring of the bearing is provided with an installation block; the top of the mounting block is provided with a matching block; the left end and the right end of the matching block are respectively and rotatably connected with a rotating plate; adjusting boxes are welded at the tops of the two guide rail rods respectively; opposite side walls of the two adjusting boxes are respectively provided with a locking hole; a locking box body is welded in the locking hole; through holes are respectively formed in the left side wall and the right side wall of the locking box body, and limiting rods are arranged in the through holes; one end of the limiting rod penetrates through one side wall of the locking box body and extends into the adjusting box; the other end of the limiting rod penetrates through the other side wall of the locking box body and extends to the outer side of the locking box body, and a pull ring block is welded on the other side wall of the locking box body; the outer side wall of the limiting rod is welded with a spring plate; the spring plate is arranged inside the adjusting box body; one end of the locking spring is welded on one side of the spring plate; the other end of the locking spring is welded on the inner side wall of the adjusting box body far away from the adjusting box; adjusting discs are respectively arranged in the two adjusting boxes; the outer side wall of the adjusting disc is provided with a limiting groove; the number of the limiting grooves is M, and M is more than or equal to 2; the limiting groove is matched with the limiting rod for use; one end of a connecting shaft is welded on the opposite surfaces of the two adjusting discs respectively; the opposite side walls of the adjusting box are respectively provided with a shaft hole; the other end of the connecting shaft penetrates through the shaft hole and extends to the outer side of the adjusting box;

the locking and fixing structure consists of a placing plate, a heat dissipation net, a lower bottom block, an anti-slip pad, a sliding rod, a clamping block, a protective pad, a push plate and a butterfly bolt, wherein the placing plate is welded at the top of the rotating plate; the other ends of the two connecting shafts are respectively welded on the left side wall and the right side wall of the placing plate; the inside of the placing plate is provided with a heat dissipation groove; a heat dissipation net is arranged in the heat dissipation groove; the front side wall of the placing plate is provided with a lower bottom block through a bolt; the number of the lower bottom blocks is two; the rear side walls of the two lower bottom blocks are respectively provided with an anti-skid pad; the anti-skid pad is made of rubber; the top of the placing plate is provided with a clamping groove; the number of the clamping grooves is two; the two clamping grooves are respectively arranged on the rear sides of the radiating nets; a sliding rod is arranged in the clamping groove; the number of the slide bars is two; the front end and the rear end of each sliding rod are respectively welded on the front side wall and the rear side wall of the clamping groove; the outer side walls of the two sliding rods are connected with clamping blocks in a sliding manner; the front side wall of the clamping block is provided with a protective pad; the protective pad is made of rubber; a threaded hole is formed in the rear side wall of the clamping groove; the interior of the threaded hole is connected with a butterfly bolt through threads; one end of the butterfly bolt penetrates through the threaded hole and extends to the inner part of the clamping groove, and a push plate is welded on the inner part of the clamping groove.

The utility model has the advantages that:

the utility model adds the elevator structure, solves the problem that the height of the prior art is fixed and the height adjustment can not be carried out aiming at the working personnel with different height differences, when the utility model needs to carry out the height adjustment, firstly the working personnel needs to hold the lifting cylinder and press the spring pin inwards, at the moment, the lifting rod is rotated under the action of the bearing, and simultaneously the spring pin leaves the adjusting hole to be attached to the inner part of the lifting cylinder, at the moment, the height of the placing plate can be adjusted, when the proper height is selected and adjusted, the lifting rod can be rotated, and in addition, the spring pin is popped into the adjusting hole with the corresponding height again to complete the fixation, thereby solving the problem that the height difference exists among the working personnel using the utility model, and leading the working personnel to more conveniently adjust the engineering cost computer to the best viewing height, the cervical vertebra health of the working personnel is more facilitated, the working efficiency is improved, and in addition, the utility model is worthy of being noticed that when the utility model is placed in the engineering cost computer for height adjustment, the lifting rod can rapidly fall under the gravity of the engineering cost computer after the working personnel presses the spring pin, at the moment, the guide rail rod can directly contact the top plate, and the buffer spring is utilized to buffer the vibration generated by rapid falling, thereby avoiding the influence of the vibration on the precise elements in the engineering cost computer;

the utility model adds the pitching adjusting structure, solves the problem of unstable locking and positioning of the adjusting mechanism in the prior art, and enables pitching adjustment to have more convenience and stability; when the utility model is used for adjusting the pitching angle, a worker only needs to grasp the pull ring block to pull the outer side, at the moment, the pull ring block can drive the limiting rod to enable the spring plate to compress the locking spring, at the moment, the limiting rod can be drawn out from the limiting groove arranged on the outer side wall of the adjusting disc to remove the fixed limit on the adjusting disc, at the moment, the placing plate can start to rotate to adjust the angle required by the worker, after the required angle is adjusted, only the pull ring block needs to be loosened, the spring plate can be pushed and the limiting rod can be driven to be inserted into the corresponding limiting groove of the adjusting disc again under the elastic recovery of the locking spring, the adjusting disc can be limited again, and the placing plate can be positioned at the most appropriate angle, so that the limiting is firmer after the pitching adjustment, and the problem of angular deviation caused by infirm positioning in the use process of the utility model is avoided;

the utility model is additionally provided with a locking and fixing structure, thereby achieving the purpose of more stable and firm installation of the engineering cost computer, when a worker places the engineering cost computer on the utility model, firstly, the engineering cost computer is directly placed on the placing plate, at the moment, the front end of the engineering cost computer can directly support the lower bottom block, then, the worker can screw the butterfly bolt, the push plate pushes the clamping block to move towards the rear side of the engineering cost computer along the slide bar, when the protective pad on the front side wall of the clamping block contacts the rear side of the engineering cost computer, the butterfly bolt is continuously screwed, the engineering cost computer can be fixed by utilizing the clamping block to match the lower bottom block, and by adopting the mode, the engineering cost computer is adjusted more stably when being installed on the utility model, thereby avoiding the problem that the engineering cost computer drops, also avoided appearing great economic loss simultaneously, it is worth noting in addition, the increase of slipmat, protection pad has reached the problem that improves frictional force and avoid the engineering cost computer to appear wearing and tearing, and butterfly bolt's use has improved greatly the utility model discloses a practicality, the increase of radiator-grid has improved the bottom heat dispersion of engineering cost computer.

Drawings

FIG. 1 is a schematic top view of the overall structure of the present invention;

FIG. 2 is a schematic front view of the overall structure of the present invention;

FIG. 3 is a schematic top view of the placement board of the present invention;

FIG. 4 is a schematic view of the internal structure of the adjusting box of the present invention;

FIG. 5 is a schematic side view of the adjusting plate of the present invention;

FIG. 6 is a schematic view of the clamping block of the present invention;

FIG. 7 is an enlarged view of portion A of FIG. 2 according to the present invention;

fig. 8 is an enlarged schematic view of a portion B of fig. 2 according to the present invention;

fig. 9 is an enlarged schematic view of a portion C in fig. 1 according to the present invention.

As shown in the figure: 1-base plate, 11-base plate, 2-lifting cylinder, 21-lifting rod, 22-adjusting hole, 23-guide sleeve, 231-buffer spring, 232-top plate, 24-support plate, 25-guide rail rod, 26-spring pin, 27-bearing, 28-mounting block, 29-rotating plate, 210-matching block, 3-adjusting box, 31-adjusting disk, 32-limiting groove, 33-limiting rod, 34-locking box body, 35-spring plate, 36-locking spring, 37-pull ring block, 38-connecting shaft, 4-placing plate, 41-radiating net, 42-lower bottom block, 43-anti-skid pad, 44-clamping groove, 45-sliding rod, 46-clamping block, 47-protection pad, 48-push plate, 49-butterfly bolt.

Detailed Description

Example 1

The utility model provides a pitching adjusting mechanism of a calculator for engineering cost, which is characterized in that the pitching adjusting mechanism comprises a base plate 1, a bottom plate 11, a lifting structure, a pitching adjusting structure and a locking and fixing structure; the left end and the right end of the substrate 1 are respectively welded with a bottom plate 11; the upper side of the base plate 1 is provided with a lifting structure; the top of the lifting structure is provided with a pitching adjusting structure; a locking and fixing structure is arranged in the pitching adjusting structure;

the lifting structure consists of a lifting cylinder 2, a lifting rod 21, a guide sleeve 23, a buffer spring 231, a top plate 232, a support plate 24, a guide rail rod 25 and a spring pin 26, wherein the lifting cylinder 2 is welded at the top of the base plate 1; the outer side wall of the lifting cylinder 2 is provided with an adjusting hole 22; the number of the adjusting holes 22 is N, and N is more than or equal to 2; a lifting rod 21 is arranged in the lifting cylinder 2; the outer side wall of the lifting rod 21 is provided with a mounting groove, and a spring pin 26 is mounted in the mounting groove; the spring pin 26 is matched with the adjusting hole 22; the tops of the two bottom plates 11 are respectively provided with a guide sleeve 23; one end of a buffer spring 231 is welded at the bottom inside the guide sleeve 23; the other end of the buffer spring 231 is welded with a top plate 232; one end of a support plate 24 is welded on the outer side wall of the guide sleeve 23; the other end of the supporting plate 24 is welded on the top of the bottom plate 11; the number of the supporting plates 24 is four; a guide rail rod 25 is arranged in the guide sleeve 23;

the pitching adjusting structure consists of a bearing 27, a mounting block 28, a rotating plate 29, a matching block 210, an adjusting box 3, an adjusting disc 31, a limiting rod 33, a locking box body 34, a spring plate 35, a locking spring 36, a pull ring block 37 and a connecting shaft 38; the top of the lifting rod 21 is provided with an inner ring of a bearing 27; the outer ring of the bearing 27 is provided with a mounting block 28; the top of the mounting block 28 is provided with a matching block 210; the left end and the right end of the matching block 210 are respectively connected with a rotating plate 29 in a rotating way; the top parts of the two guide rail rods are respectively welded with an adjusting box 3; opposite side walls of the two adjusting boxes 3 are respectively provided with a locking hole; a locking box body 34 is welded inside the locking hole; the left side wall and the right side wall of the locking box body 34 are respectively provided with a through hole, and a limiting rod 33 is arranged in the through holes; one end of the limiting rod 33 penetrates through one side wall of the locking box body 34 and extends into the adjusting box 3; the other end of the limiting rod 33 penetrates through the other side wall of the locking box body 34 and extends to the outer side of the locking box body 34, and a pull ring block 37 is welded on the outer side of the locking box body 34; the outer side wall of the limiting rod 33 is welded with a spring plate 35; the spring plate 35 is arranged inside the adjusting box 3; one end of a locking spring 36 is welded to one side of the spring plate 35; the other end of the locking spring 36 is welded on the inner side wall of the adjusting box 3 body far away from the adjusting box 3; the two adjusting boxes 3 are internally provided with adjusting discs 31 respectively; the outer side wall of the adjusting disc 31 is provided with a limit groove 32; the number of the limiting grooves 32 is M, and M is more than or equal to 2; the limiting groove 32 is matched with the limiting rod 33 for use; the two adjusting discs 31 are respectively welded with one end of a connecting shaft 38 on the opposite surfaces; the opposite side walls of the adjusting box 3 are respectively provided with shaft holes; the other end of the connecting shaft 38 passes through the shaft hole and extends to the outside of the adjusting box 3;

the locking and fixing structure consists of a placing plate 4, a heat dissipation net 41, a lower bottom block 42, an anti-skid pad 43, a sliding rod 45, a clamping block 46, a protective pad 47, a push plate 48 and a butterfly bolt 49, wherein the placing plate 4 is welded at the top of the rotating plate 29; the other ends of the two connecting shafts 38 are welded to the left and right side walls of the placing plate 4, respectively; the inside of the placing plate 4 is provided with a heat radiating groove; a heat dissipating net 41 is installed inside the heat dissipating groove; the front side wall of the placing plate 4 is provided with a lower bottom block 42 through bolts; the number of the lower bottom blocks 42 is two; the rear side walls of the two lower bottom blocks 42 are respectively provided with an anti-skid pad 43; the anti-slip pad 43 is made of rubber; the top of the placing plate 4 is provided with a clamping groove 44; the number of the clamping grooves 44 is two; two clamping grooves 44 are respectively arranged on the rear side of the heat dissipation net 41; a slide rod 45 is arranged in the clamping groove 44; the number of the slide bars 45 is two; the front and rear ends of the two slide bars 45 are respectively welded on the front and rear side walls of the clamping groove 44; the outer side walls of the two sliding rods 45 are connected with clamping blocks 46 in a sliding manner; the front side wall of the clamping block 46 is provided with a protective pad 47; the protection pad 47 is made of rubber; a threaded hole is formed in the rear side wall of the clamping groove 44; a butterfly bolt 49 is connected to the inside of the threaded hole through threads; one end of the wing bolt 49 extends through the threaded hole to the inside of the clamping groove 44, and a push plate 48 is welded.

Example 2

When the utility model is used, firstly, a worker needs to directly place the engineering cost computer on the placing plate 4, at the moment, the front end of the engineering cost computer can directly support the lower bottom block 42, and then, the worker can screw the butterfly bolt 49 after working, so that the push plate 48 pushes the clamping block 46 to move towards the rear side of the engineering cost computer along the slide rod 45, and when the protective pad 47 on the front side wall of the clamping block 46 contacts the rear side of the engineering cost computer, the butterfly bolt 49 is continuously screwed, and the clamping block 46 can be used for being matched with the lower bottom block 42 to fix the engineering cost computer;

when the utility model discloses when need carry out height control, at first the staff need hold lift section of thick bamboo 2 to press spring catch 26 to inside, rotatory lifter 21 this moment, lifter 21 rotates under bearing 27's effect, spring catch 26 leaves the inside laminating of adjusting hole 22 with lift section of thick bamboo 2 simultaneously, can adjust the height of placing board 4 this moment, after the suitable height has been adjusted to the selection, can rotate lifter 21, in addition spring catch 26 springs into adjusting hole 22 of corresponding height again, and accomplish fixedly;

the utility model discloses when carrying out pitch angle regulation, it only needs to grasp pull ring piece 37 to be the staff, with the outside pulling, pull ring piece 37 can drive gag lever post 33 this moment and make spring plate 35 compression locking spring 36, gag lever post 33 can be taken out from the spacing groove 32 that adjustment disk 31 lateral wall was seted up this moment, remove fixed spacing to adjustment disk 31, place this moment board 4 alright with begin to rotate the angle that the regulation work needed, after adjusting the angle that needs well, only need loosen pull ring piece 37, can be under the elasticity restoration of locking spring 36, promote spring plate 35 and drive gag lever post 33 and insert the spacing groove 32 that adjustment disk 31 corresponds again, can be spacing again to adjustment disk 31, place this moment board 4 and can be in the most suitable angle.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. The utility model discloses each part that mentions is the common technique in prior art, and the technical personnel of this trade should understand, the utility model discloses do not receive the restriction of above-mentioned embodiment, the description only is the explanation in above-mentioned embodiment and the description the principle of the utility model, under the prerequisite that does not deviate from the spirit and the scope of the utility model, the utility model discloses still can have various changes and improvement, these changes and improvement all fall into the protection of claim the utility model is within the scope. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (5)

1. A pitching adjusting mechanism of a calculator for engineering cost is characterized by comprising a base plate, a bottom plate, a lifting structure, a pitching adjusting structure and a locking and fixing structure; bottom plates are welded at the left end and the right end of the substrate respectively; the upper side of the substrate is provided with a lifting structure; the top of the lifting structure is provided with a pitching adjusting structure; a locking and fixing structure is arranged in the pitching adjusting structure;

the lifting structure consists of a lifting cylinder, a lifting rod, a guide sleeve, a buffer spring, a top plate, a supporting plate, a guide rail rod and a spring pin, wherein the lifting cylinder is welded at the top of the base plate; the outer side wall of the lifting cylinder is provided with an adjusting hole; a lifting rod is arranged inside the lifting cylinder; the outer side wall of the lifting rod is provided with a mounting groove, and a spring pin is mounted inside the mounting groove; the spring pin is matched with the adjusting hole for use; the tops of the two bottom plates are respectively provided with a guide sleeve; one end of a buffer spring is welded at the bottom of the interior of the guide sleeve; a top plate is welded at the other end of the buffer spring; one end of a supporting plate is welded on the outer side wall of the guide sleeve; the other end of the supporting plate is welded on the top of the bottom plate; the number of the supporting plates is four; a guide rail rod is arranged inside the guide sleeve;

the pitching adjusting structure consists of a bearing, an installation block, a rotating plate, a matching block, an adjusting box, an adjusting disc, a limiting rod, a locking box body, a spring plate, a locking spring, a pull ring block and a connecting shaft; the top of the lifting rod is provided with an inner ring of a bearing; the outer ring of the bearing is provided with an installation block; the top of the mounting block is provided with a matching block; the left end and the right end of the matching block are respectively and rotatably connected with a rotating plate; adjusting boxes are welded at the tops of the two guide rail rods respectively; opposite side walls of the two adjusting boxes are respectively provided with a locking hole; a locking box body is welded in the locking hole; through holes are respectively formed in the left side wall and the right side wall of the locking box body, and limiting rods are arranged in the through holes; one end of the limiting rod penetrates through one side wall of the locking box body and extends into the adjusting box; the other end of the limiting rod penetrates through the other side wall of the locking box body and extends to the outer side of the locking box body, and a pull ring block is welded on the other side wall of the locking box body; the outer side wall of the limiting rod is welded with a spring plate; the spring plate is arranged inside the adjusting box body; one end of the locking spring is welded on one side of the spring plate; the other end of the locking spring is welded on the inner side wall of the adjusting box body far away from the adjusting box; adjusting discs are respectively arranged in the two adjusting boxes; the outer side wall of the adjusting disc is provided with a limiting groove; the limiting groove is matched with the limiting rod for use; one end of a connecting shaft is welded on the opposite surfaces of the two adjusting discs respectively; the opposite side walls of the adjusting box are respectively provided with a shaft hole; the other end of the connecting shaft penetrates through the shaft hole and extends to the outer side of the adjusting box;

the locking and fixing structure consists of a placing plate, a heat dissipation net, a lower bottom block, an anti-slip pad, a sliding rod, a clamping block, a protective pad, a push plate and a butterfly bolt, wherein the placing plate is welded at the top of the rotating plate; the other ends of the two connecting shafts are respectively welded on the left side wall and the right side wall of the placing plate; the inside of the placing plate is provided with a heat dissipation groove; a heat dissipation net is arranged in the heat dissipation groove; the front side wall of the placing plate is provided with a lower bottom block through a bolt; the number of the lower bottom blocks is two; the rear side walls of the two lower bottom blocks are respectively provided with an anti-skid pad; the top of the placing plate is provided with a clamping groove; the number of the clamping grooves is two; the two clamping grooves are respectively arranged on the rear sides of the radiating nets; a sliding rod is arranged in the clamping groove; the number of the slide bars is two; the front end and the rear end of each sliding rod are respectively welded on the front side wall and the rear side wall of the clamping groove; the outer side walls of the two sliding rods are connected with clamping blocks in a sliding manner; the front side wall of the clamping block is provided with a protective pad; a threaded hole is formed in the rear side wall of the clamping groove; the interior of the threaded hole is connected with a butterfly bolt through threads; one end of the butterfly bolt penetrates through the threaded hole and extends to the inner part of the clamping groove, and a push plate is welded on the inner part of the clamping groove.

2. The pitch adjustment mechanism for construction cost calculator according to claim 1 wherein the number of said adjustment holes is N, N being 2 or more.

3. The pitch adjustment mechanism of a construction cost calculator according to claim 1, wherein the number of the limit grooves is M, and M is greater than or equal to 2.

4. The pitch adjustment mechanism for a construction cost calculator of claim 1 wherein said non-slip mat is rubber.

5. A pitch adjustment mechanism for a construction cost calculator according to claim 1 wherein said protective pad is rubber.

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