CN212274846U

CN212274846U - Concrete test block flatness detection device

Info

Publication number: CN212274846U
Application number: CN202021013450.1U
Authority: CN
Inventors: 孟庆章; 王娜娜; 王硕
Original assignee: Hebei Qilin Building Technology Development Co ltd
Current assignee: Hebei Qilin Building Technology Development Co ltd
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-01-01
Anticipated expiration: 2030-06-05

Abstract

The utility model relates to a concrete test block flatness detection device belongs to detection device's technical field, it includes the standard plate, the fixed support that is provided with in standard plate bottom, one side horizontal sliding connection of standard plate has vertical measuring stick, the relative standard plate of measuring stick slides along vertical direction, the fixed scale plate that is provided with on the lateral wall that the standard plate is close to the measuring stick, be provided with the marker pen between measuring stick and the standard plate, marker pen tail end is inserted with the measuring stick and is inlayed fixedly, marker pen nib and scale plate butt are inserted and are inlayed and be provided with the horizontal plate on the support, the horizontal plate covers under the measuring stick, the utility model has the advantages of carry in the workman, carry out the effect that on-the-spot concrete test block flatness detected.

Description

Concrete test block flatness detection device

Technical Field

The utility model belongs to the technical field of detection device's technique and specifically relates to a concrete test block flatness detection device is related to.

Background

No matter what kind of construction method is adopted in the construction site at present, test blocks can be manufactured in the construction process so as to test the quality of materials and the precision of equipment, various concrete test blocks can be used, and the precision of the equipment or the quality of large-batch materials can be calculated through a small template. The processing factory is given with big concrete test block outsourcing in batches in the building site, and the factory transports the concrete member of making to the building site and is examined and accepted by the prison organization, and the prefabricated component after examining and accepting the qualification just allows the entering to use, and the examination and acceptance project is many wherein including the detection of concrete prefabricated member plane degree. Flatness is one of the important characteristics of products, and currently, common flatness detection methods include a detection platform matched with a feeler gauge, a level gauge, a laser plane interferometer measurement method and the like.

The existing Chinese patent with reference to the publication number CN107843183A discloses a flatness detection device, which comprises a frame, a feeding module is fixedly arranged on the frame, a first detection module is fixedly arranged beside the feeding module, a second detection module is fixedly arranged on the frame next to the first detection module, a material moving module for discharging is fixedly arranged on the frame, the feeding module generates kinetic energy through external motor power equipment to convey detection materials on the frame, the first detection module performs first flatness detection, the second detection module is used for performing second detection, the accuracy of detection is guaranteed through twice detection, and the detected materials are conveyed away from the frame by the material moving module.

The above prior art solutions have the following drawbacks: the equipment needs many components for equipment composition, and complete equipment is heavy, needs to be equipped with external power supply, and when prisoner organization each department went to the concrete test block inspection of entering, transported the scene with equipment, wasted time and energy, still need pull external power supply, for the on-the-spot detection inconvenience that brings.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a concrete test block plane degree detection device reaches the workman of being convenient for and carries out the effect that on-the-spot concrete test block plane degree detected.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides a concrete test block flatness detection device, including the standard plate, the fixed support that is provided with in standard plate bottom, one side horizontal sliding connection of standard plate has vertical measuring stick, the relative standard plate of measuring stick slides along vertical direction, the standard plate is close to the fixed scale plate that is provided with on the lateral wall of measuring stick, be provided with the marker pen between measuring stick and the standard plate, marker pen tail end is inserted with the measuring stick and is inlayed fixedly, marker pen nib and scale plate butt, it is provided with the horizontal plate to insert to inlay on the support, the horizontal plate covers under the measuring stick.

Through adopting above-mentioned technical scheme, the standard plate provides the plane board of standard as the reference standard, the support plays the supporting role to the standard plate, the horizontal plate is fixed on the support through inserting the inlay, and cover under to the measuring stick, put the concrete test block that awaits measuring on the horizontal plate under the measuring stick, make measuring stick bottommost and concrete test block surface butt, promote on the horizontal plate and wait the concrete test block, if concrete test block surface unevenness, then the measuring stick can fluctuate, through the line segment of marker pen vertical direction under drawing on the scale plate, supply the testing personnel directly perceivedly to read out the result that the plane degree detected, this device does not need external power source equipment to assist, the whole constitution is simple light and handy, convenient to use workman carries, carry out the detection of on-the-spot concrete test block plane degree at any time.

The utility model discloses further set up to: the measuring rod is provided with a long-strip through hole, the long-strip through hole is formed along the length direction of the measuring rod, and one end, far away from the hand wheel, of the positioning rod penetrates through the long-strip through hole and then is connected with a separation blade in a threaded mode.

Through adopting above-mentioned technical scheme, the measuring stick is when measuring, because of the concrete test block surface unevenness that awaits measuring is beated from top to bottom, and the offering of rectangular through-hole has planned fixed path for the measuring stick at the slip of vertical direction, avoids the slope to slide, makes measured data more accurate, and the setting up of separation blade has prevented that the measuring stick from breaking away from the locating lever because of sliding.

The utility model discloses further set up to: the support includes a plurality of landing legs and pulley, has all seted up the draw-in groove on every landing leg, and the draw-in groove level is seted up, and the horizontal plate is inserted and is inlayed in the draw-in groove and be the horizontality, is provided with the latch fitting on the pulley, and the measuring stick is kept away from standard board one end and is rotated and be provided with the gyro wheel.

Through adopting above-mentioned technical scheme, set up the draw-in groove on the landing leg, the fixed mode that the horizontal plate inlayed at the draw-in groove interpolation, the installation and the carrying of the horizontal plate of being convenient for can take off at any time when not using the horizontal plate and take out, the setting of pulley is convenient for removing of this device and moves, and the latch fitting is used for the braking to the pulley, guarantees the steady that the device was placed, and the setting of gyro wheel is convenient for the measuring stick more smooth to the measurement of concrete test block surface smoothness.

The utility model discloses further set up to: the standard plate is provided with a slide, the slide is horizontally arranged along the length direction of the standard plate, the slide penetrates through the side wall of the standard plate arranged along the length direction of the slide, a positioning rod is arranged on the standard plate, the positioning rod is arranged in the slide and is perpendicular to the length direction of the standard plate, two ends of the positioning rod extend out of two sides of the standard plate, one end of the positioning rod is provided with a measuring rod in a sliding mode, the other end of the positioning rod is fixedly provided with a hand wheel, and the positioning rod horizontally slides in.

Through adopting above-mentioned technical scheme, the locating lever plays the supporting role to the measuring stick, the fixed of hand wheel control locating lever is gripped, when the concrete test block weight is high bulky, can't place on the horizontal plate, take out the horizontal plate this moment, with measuring stick gyro wheel and concrete test block surface butt, promote the locating lever, make the locating lever drive the measuring stick in slipping, along slide length direction horizontal slip, thereby measure the plane degree of bulky concrete test block, the setting of slide has increased the application range of this device.

The utility model discloses further set up to: the utility model discloses a measuring instrument, including measuring pole, outer pole, first bolt, outer pole outer wall butt, the measuring pole includes interior pole and outer pole, and rectangular through-hole setting is kept away from outer pole one end at interior pole, and interior pole is close to outer pole one end and is inserted and inlay inside the outer pole, and the outer pole is close to interior pole one end and has seted up first screw, is provided with first bolt on the outer pole, and first bolt passes first screw thread and interior pole outer wall butt, and interior pole one end is rotated with the gyro wheel.

Through adopting above-mentioned technical scheme, adjust the total length of measuring stick through the relative distance who changes interior pole and outer pole, the total length of adjusting the measuring stick is fixed through first bolt and first screw, thereby the bolt is deepened outer pole one end and interior pole outer wall butt and is extruded interior pole formation and fix. The adjustment of measuring stick height is convenient for adapt to the plane degree detection of the concrete test block that awaits measuring of different heights, has increased the application scope of this device.

The utility model discloses further set up to: every the landing leg includes inner tube and urceolus, and inner tube one end and standard board fixed connection, inside the second screw was seted up and inserted the urceolus to the other end, the urceolus leaned on and offered the roll adjustment slot hole through inner tube one end, and the roll adjustment slot hole is seted up along urceolus length direction, and the urceolus is kept away from inner tube one end and is rotated with the pulley and be connected, is connected with the second bolt on the urceolus, and the second bolt passes roll adjustment slot hole and second screw threaded connection.

Through adopting above-mentioned technical scheme, the second bolt passes roll adjustment slot hole and second screw threaded connection, loosens the second bolt and makes the second screw slide from top to bottom in the length range of roll adjustment slot hole, thereby the relative distance of inner tube and urceolus produces the change and changes the total length of landing leg promptly, and the landing leg after finishing the regulation is screwed up the second bolt once more and is accomplished fixedly. The effective length of landing leg is changed through the setting of inner tube urceolus, can make the landing leg height reduce to detection device's volume reduces, is convenient for manual carrying and transportation.

The utility model discloses further set up to: the standard plate comprises a top plate and a bottom plate, the top plate is located above the bottom plate, the contact side of the top plate and the contact side of the bottom plate are in mirror symmetry, the end portions of the top plate and the bottom plate are hinged, and the hinge axis is parallel to the positioning rod.

Through adopting above-mentioned technical scheme, roof and bottom plate articulated connected mode, the folding of the standard plate of being convenient for to reduce the area of this equipment when not using, articulated connected mode is convenient for roof upset back and bottom plate and is in same horizontal plane simultaneously, the slide on the floor is trilateral form of opening the bottom plate lateral wall, roof and floor set up for the symmetry, turn over the roof that gets off and bottom plate in close contact with, the slide link up the expansion completely promptly and is two times of original length, thereby enlarge the effective area of horizontal plate and make the measuring length of measuring stick double.

The utility model discloses further set up to: the measuring rod is provided with a cylinder, the cylinder is horizontally arranged, one end of the cylinder is fixedly connected with the measuring rod, the cylinder is inserted by the marking pen, a third bolt is arranged on the cylinder, and the thread of the third bolt penetrates into one end of the cylinder to be abutted against the surface of the marking pen.

Through adopting above-mentioned technical scheme, the setting of third bolt extrudees the marker pen in the drum inner wall, and the marker pen of inlaying then can adopt the marker pen of thickness difference to insert in the drum, has increased the chooseing for use scope of marker pen, and it is that this device has more the practicality.

To sum up, the utility model discloses a beneficial technological effect does:

1. the device does not need external auxiliary equipment, has a light and handy whole structure and is convenient to carry, and due to the arrangement of the scale plate and the marking pen, a detector can visually read the fluctuation range of the planeness of the detected concrete test block;

2. the adjustable setting of landing leg and measuring stick makes this device can be suitable for and not equidimension concrete test block's that awaits measuring flatness detects, has increased the application scope of this device.

Drawings

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

FIG. 2 is a schematic view showing a part of the structure of the standard plate of the present invention;

FIG. 3 is an exploded view of the structure of the bracket and the detecting rod of the present invention;

FIG. 4 is a schematic view of the standard plate of the present invention in an expanded state;

fig. 5 is a schematic view showing a part of the structure of the cylinder of the present invention.

In the figure, 1, a standard plate; 11. a top plate; 12. a base plate; 121. a slideway; 122. a scale plate; 2. a support; 21. a support leg; 211. an inner barrel; 2111. a second screw hole; 212. an outer cylinder; 2121. a distance adjusting long hole; 2122. a second bolt; 2123. a card slot; 22. a pulley; 221. a lock; 3. positioning a rod; 31. a hand wheel; 32. a baffle plate; 4. a measuring rod; 41. an inner rod; 411. a strip through hole; 412. a first screw hole; 42. an outer rod; 421. a roller; 422. a first bolt; 5. a horizontal plate; 6. a cylinder; 61. a third bolt; 7. a marking pen.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, for the utility model discloses a concrete test block flatness detection device, including standard plate 1, the fixed support 2 that is provided with in 1 bottom of standard plate, one side horizontal sliding connection of standard plate 1 has vertical measuring stick 4, measuring stick 4 slides along vertical direction relatively standard plate 1, and fixed scale plate 122 that is provided with on standard plate 1 is close to the 4 sides of measuring stick, is provided with marker 7 between measuring stick 4 and the standard plate 1, and marker 7 tail ends are inserted and are inlayed with measuring stick 4 and are connected, and marker 7 nibs and scale plate 122 butt. All seted up draw-in groove 2123 on every landing leg 21, the horizontal plate 5 is inserted and is inlayed in draw-in groove 2123, horizontal plate 5 is located under measuring stick 4, place the concrete test block that awaits measuring on the horizontal plate 5, with measuring stick 4 undermost and the concrete test block surface butt that awaits measuring, promote on the concrete test block horizontal plate 5 again that will await measuring, make measuring stick 4 undermost from the concrete test block surface that awaits measuring slide completely, it judges whether qualified by the detected concrete test block plane degree to observe the vestige that marker pen 7 left on scale plate 122.

Referring to fig. 1 and 2, a standard plate 1 is a rectangular plate, the standard plate 1 includes a top plate 11 and a bottom plate 12, the length direction of the bottom plate 12 is the same as the horizontal sliding direction of a measuring rod 4, the bottom of the bottom plate 12 is fixedly connected with a support 2, the bottom plate 12 is provided with a slide rail 121, the slide rail 121 is horizontally arranged along the length direction of the bottom plate 12, the slide rail 121 is completely opened in the horizontal direction through the adjacent three side walls of the bottom plate 12, a positioning rod 3 is arranged on the bottom plate 12, the positioning rod 3 is rectangular and strip-shaped, the positioning rod 3 slides in the slide rail 121 along the horizontal direction of the slide rail 121, two ends of the positioning rod 3 protrude out of the side walls of the bottom plate 12, one end of; the top of the bottom plate 12 is stacked with the top plate 11, the top plate 11 is arranged in a mirror image mode by contacting the top plate 11 with the bottom plate 12, the end portions of the top plate 11 and the bottom plate 12 are hinged to each other, the hinged side face is a side face through which the slide rails 121 are completely opened, the top plate 11 is tightly attached to the bottom plate 12 after rotating 180 degrees and is located on the same horizontal plane, and the slide rails 121 on the top plate 11 are completely communicated with the slide rails 121 on the bottom plate 12. .

Referring to fig. 2 and 3, the measuring rod 4 is a rectangular long rod, a long through hole 411 is formed in the measuring rod 4, the long through hole 411 is formed in the length direction of the measuring rod 4, and the long through hole 411 enables the measuring rod 4 to fluctuate up and down along with a measuring surface if the measuring surface is uneven during measurement, so that the marker 7 is driven to leave marks on the scale plate 122. Hand wheel 31 is discoid, and the locating lever 3 is kept away from hand wheel 31 one end and is passed rectangular through-hole 411 and threaded connection has separation blade 32, and separation blade 32 prevents that measuring stick 4 from breaking away from locating lever 3 when fluctuating from top to bottom because of the testee surface unevenness, and the distance between 4 distance scale boards 122 of restriction measuring stick makes marker 7 continuously leave the record mark on scale board 122 simultaneously.

Referring to fig. 3, a cylinder 6 is disposed on one side surface of the measuring rod 4 close to the scale plate 122, one end of the cylinder 6 is fixedly connected with the scale plate 122, and the other end of the cylinder 6 is open. The drum 6 is connected with a third bolt 61 through threads, the third bolt 61 penetrates through the wall of the drum 6 and then abuts against the surface of the marking pen 7, the marking pen 7 is fixed inside the drum 6 in an extruding mode, the drum 6 can be inserted and embedded into the marking pens 7 with different thicknesses through the third bolt 61, and therefore the device is convenient to use.

Referring to fig. 1 and 4, the bracket 2 includes four support legs 21, a pulley 22 is rotatably disposed at the bottom of each support leg 21, a locking member 221 is rotatably disposed between the pulley 22 and the support leg 21, the locking member 221 is used for locking and fixing the pulley 22, each support leg 21 includes an inner cylinder 211 and an outer cylinder 212, the inner cylinder 211 and the outer cylinder 212 are rectangular hollow cylinders, the top end of the inner cylinder 211 is fixedly connected with the bottom plate 12, a second screw hole 2111 is formed at the bottom end of the inner cylinder 211 and inserted into the outer cylinder 212, an adjustable long hole 2121 is formed in one end of the outer cylinder 212, which is close to the inner cylinder 211, one end of the outer cylinder 212, which is far away from the inner cylinder 211, is rotatably connected with the pulley 22, a second bolt 2122 is disposed on the outer cylinder 212, the second bolt 2122 penetrates through the adjustable long hole 2121 and is in threaded connection with the second screw hole 2111, the total length of the support legs 21 can be adjusted by the arrangement of the inner cylinder 211 and the outer cylinder 212, so that 212 the adjustment of the position is fixed.

Referring to fig. 4, the measuring rod 4 includes an inner rod 41 and an outer rod 42, the inner rod 41 and the outer rod 42 are rectangular hollow cylinders, a long through hole 411 is formed at one end of the inner rod 41 far from the outer rod 42, and one end of the inner rod 41 close to the outer rod 42 is inserted into the outer rod 42. Outer pole 42 has been seted up first screw 412 on being close to interior pole 41 one end lateral wall, outer pole 42 is kept away from interior pole 41 one end and is rotated and be provided with gyro wheel 421, gyro wheel 421 makes measuring stick 4 be surveyed the concrete test block and await measuring the gliding more smooth of face, be provided with first bolt 422 on the outer pole 42, first bolt 422 screw thread passes first screw 412 one end and interior pole 41 outer wall butt, the relative outer pole 42's of interior pole 41 slip is restricted, accomplish the fixed of 4 lengths of measuring stick. The measuring rod 4 adjusts the total length through the inner rod 41 and the outer rod 42 to adapt to components to be measured at different heights.

The implementation principle of the embodiment is as follows: push away this device to the building site on the concrete test block next door that awaits measuring, step on latch fitting 221 and lock pulley 22 spacing, make support 2 stable placing in place, earlier calibrate this device through calibration equipment before using this device, the calibration rear can use. Inserting a horizontal plate 5 into a clamping groove 2123 on a supporting leg 21, placing a concrete test block to be tested on the horizontal plate 5 and under a measuring rod 4, adjusting the total length of the measuring rod 4 through a first bolt 422 to enable a roller 421 to be abutted to a surface to be tested of the concrete test block to be tested, holding a hand wheel 31 by hand to fix a positioning rod 3, linearly pushing the concrete test block to be tested to enable the roller 421 to slide from one end of the surface to be tested to the other end, and if the planeness of the surface to be tested meets the standard, keeping a marking pen 7 all the time without leaving original position marks on a scale plate 122; if the surface to be measured is uneven, when detecting, measuring stick 4 can fluctuate from top to bottom along with the detection plane to mark pen 7 leaves vertical line segment on scale plate 122, can directly perceivedly read out the difference in height through the scale mark, thereby judges whether the plane degree of being surveyed the concrete test block accords with the allowable error.

As shown in FIG. 5, when the concrete test block is large, the horizontal plate 5 is removed, and the device is pushed aside the concrete test block to lock the locking piece 221. Thereby the elasticity through adjusting second bolt 2122 changes landing leg 21's total length and changes the whole height of this device, adjusts the total length of measuring stick 4 through the first bolt 422 of elasticity, makes gyro wheel 421 and the await measuring face butt of concrete member that awaits measuring, if the concrete member that awaits measuring can also be put on horizontal plate 5, then inserts the horizontal plate 5 of adaptation, if can not keep off on horizontal plate 5, then place subaerial can of level. The top plate 11 is turned over by 180 degrees along the hinge shaft, so that the slide rail 121 on the top plate 11 and the slide rail on the bottom plate 12 are positioned at the same horizontal line and are communicated, the hand wheel 31 horizontally slides along the length direction of the slide rail 121, the roller 421 is tightly attached to the tested surface of the concrete test block to start rolling, and the mark pen 7 leaves a mark line on the scale plate 122. If the flatness of the measured surface meets the specification, the trace line left on the scale plate 122 is a horizontal straight line, and if the trace line is a wave curve, the numerical value is visually read through the scale line on the scale plate 122, and whether the flatness of the measured surface meets the allowable error is judged.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a concrete test block flatness detecting device, includes standard plate (1), and standard plate (1) bottom is fixed to be provided with support (2), its characterized in that: one side horizontal sliding connection of standard board (1) has vertical measuring stick (4), measuring stick (4) slides along vertical direction relative standard board (1), fixed scale plate (122) that is provided with on the lateral wall that standard board (1) is close to measuring stick (4), be provided with marker pen (7) between measuring stick (4) and standard board (1), marker pen (7) tail end is inserted with measuring stick (4) and is inlayed fixedly, marker pen (7) nib and scale plate (122) butt, it is provided with horizontal plate (5) to insert to inlay on support (2), horizontal plate (5) cover under measuring stick (4).

2. The concrete test block flatness detecting apparatus according to claim 1, wherein: the measuring rod (4) is provided with a long strip through hole (411), the long strip through hole (411) is formed along the length direction of the measuring rod (4), and one end, far away from the hand wheel (31), of the positioning rod (3) penetrates through the long strip through hole (411) and then is connected with a blocking piece (32) through threads.

3. The concrete test block flatness detecting apparatus according to claim 1, wherein: the support (2) comprises a plurality of supporting legs (21) and pulleys (22), a clamping groove (2123) is formed in each supporting leg (21), the clamping groove (2123) is horizontally formed, the horizontal plate (5) is inserted into the clamping groove (2123) and is in a horizontal state, a locking piece (221) is arranged on each pulley (22), and one end, far away from the standard plate (1), of the measuring rod (4) is rotatably provided with a roller (421).

4. The concrete test block flatness detecting apparatus according to claim 2, wherein: the standard plate is characterized in that a slide way (121) is formed in the standard plate (1), the slide way (121) is horizontally formed in the length direction of the standard plate (1), the slide way (121) penetrates through a side wall of the standard plate (1) which is arranged in the length direction of the slide way (121), a positioning rod (3) is arranged on the standard plate (1), the positioning rod (3) is placed in the slide way (121) and is perpendicular to the length direction of the standard plate (1), two ends of the positioning rod (3) extend out of two sides of the standard plate (1), one end of the positioning rod (3) is provided with a measuring rod (4) in a sliding mode, the other end of the positioning rod (3) is fixedly provided with a hand wheel (31), and the.

5. The concrete test block flatness detecting apparatus according to claim 4, wherein: measuring stick (4) are including interior pole (41) and outer pole (42), outer pole (42) one end is kept away from in interior pole (41) to rectangular through-hole (411) setting, interior pole (41) are close to outer pole (42) one end and are inserted and inlay inside outer pole (42), outer pole (42) are close to interior pole (41) one end and have been seted up first screw (412), be provided with first bolt (422) on outer pole (42), first bolt (422) pass first screw (412) screw and interior pole (41) outer wall butt, interior pole (41) one end is kept away from in outer pole (42) and gyro wheel (421) rotate and are connected, the axis of rotation perpendicular to slide (121) length direction of gyro wheel (421).

6. The device for detecting the flatness of the concrete test block according to claim 3, wherein: every landing leg (21) includes inner tube (211) and urceolus (212), inner tube (211) one end and standard board (1) fixed connection, second screw (2111) has been seted up to the other end and inside inserting urceolus (212), urceolus (212) lean on through inner tube (211) one end seted up roll adjustment slot hole (2121), roll adjustment slot hole (2121) are seted up along urceolus (212) length direction, urceolus (212) are kept away from inner tube (211) one end and are rotated with pulley (22) and be connected, be connected with second bolt (2122) on urceolus (212), second bolt (2122) pass roll adjustment slot hole (2121) and second screw (2111) threaded connection.

7. The concrete test block flatness detecting apparatus according to claim 4, wherein: the standard plate (1) comprises a top plate (11) and a bottom plate (12), the top plate (11) is located above the bottom plate (12), the contact side faces of the top plate (11) and the bottom plate (12) are mirror symmetry, the end portions of the top plate (11) and the bottom plate (12) are hinged, and the hinge axis is parallel to the positioning rod (3).

8. The concrete test block flatness detecting apparatus according to claim 1, wherein: be provided with drum (6) on measuring stick (4), drum (6) level sets up, and drum (6) one end and measuring stick (4) fixed connection, and drum (6) are inserted by marker pen (7), are provided with third bolt (61) on drum (6), and third bolt (61) screw thread penetrates drum one end and marker pen (7) surface butt.