A tensile gauge for building anchor steel bars

Abstract

The invention provides a tensile gauge for anchoring steel bars in construction, including a suitcase, an oil tank installed in the suitcase, a manual pump, and a storage chamber for placing detection parts; the suitcase includes a box body, a front door installed at the front end of the box body, and a box cover installed on the top of the box body, and the front door and the box cover are fixed by the cooperation of a locking member and a supporting leg; the oil tank and the storage chamber are respectively arranged in the box body, and the manual pump is installed in the box body at one end, and an oil pipe is extended after the manual pump passes through the side wall of the box body, and the manual pump is connected to the detection part through the oil pipe. The tensile gauge created by the invention is integrated with the box body, which solves the hygiene problem of the tensile gauge, and is extremely convenient to use, and the detection parts are collected in the box body, and the storage space is divided into upper and lower chambers. Since the oil pipe is made of soft material, the required space is relatively saved, and it is convenient to divide it into two detection part storage chambers to save space.

Description

Technical Field

[0001] The invention belongs to the technical field of building steel bar detection, and in particular relates to a tensile meter for building anchor steel bars. Background Art

[0002] The existing dynamometer needs to be taken out of a portable case during actual operation on site. The dynamometer is easily stained with sand during the actual operation, and it is difficult to clean the display screen to prevent water from entering during cleaning. Therefore, a dynamometer with an integrated portable case is designed. Summary of the invention

[0003] In view of this, the present invention aims to provide a tensile gauge for building anchoring steel bars to solve the problems of tensile gauge protection and cleaning.

[0004] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0005] A tensile gauge for building anchoring steel bars, comprising a suitcase, an oil tank installed in the suitcase, a manual pump, and a receiving cavity for placing a testing part;

[0006] The suitcase includes a box body, a front door installed at the front end of the box body, and a box cover installed on the top of the box body, and the front door and the box cover are fixed by the cooperation of a locking member and a supporting leg;

[0007] The oil tank and the accommodating cavity are respectively arranged in the box body. The manual pump is installed in the box body at one end of the oil tank. One end of the manual pump passes through the side wall of the box body and then extends out of the oil pipe, and the manual pump is connected to the detection part through the oil pipe.

[0008] Furthermore, a pressure head is installed on the top of the manual pump, and a rotating head is installed on the pressure head. The pressure head is vertically arranged to the manual pump, and a pressure rod is connected to one end of the rotating head. A pressure rod groove is provided on the oil tank, and the pressure rod is rotated and installed into the pressure rod groove through the rotating head.

[0009] Furthermore, a support assembly is installed on the side wall of the front door, a support assembly installation groove is provided on the side wall of the front door, the support assembly is installed in the support assembly installation groove, one end of the support assembly is hinged to the support assembly installation groove, the support assembly includes an adjusting rod and an adjusting member for adjusting the height of the adjusting rod, a support plate is installed at one end of the adjusting rod, a groove corresponding to the pressure rod is provided on the top of the support plate, and the pressure rod is placed in the groove.

[0010] Furthermore, the detection parts include a reaction force support ring, an anchor, an oil cylinder, and an oil pipe. The accommodating cavity includes a top cavity and a bottom cavity. The top cavity is provided with a reaction force support ring placement groove, an anchor placement groove, and an oil cylinder placement groove. The support ring, anchor, and oil cylinder are respectively placed in the top cavity, and the oil pipe is installed in the bottom cavity. The rear wall of the box body is provided with an opening corresponding to the bottom cavity, and a rear door is installed at the opening of the rear wall of the box body.

[0011] Furthermore, a fixing piece is installed on the rear wall of the box body, and a card slot for fixing the fixing piece is provided on the rear door. The fixing piece includes a locking adjustment head and a lock tongue. A retraction groove is provided at the opening of the rear wall, and a through hole communicating with the retraction groove is provided on the rear wall. One end of the locking adjustment head passes through the through hole and is fixedly connected with the lock tongue. The lock tongue is located in the retraction groove, and the size of the lock tongue corresponds to the size of the retraction groove. The card slot is set at the top of the rear door, and the lock tongue is carded into the card slot.

[0012] Furthermore, the front wall of the box is open, the top of the box is connected to the front end of the box, the front door is rotatably mounted on the two side walls near the lower end of the box, one end of the box cover is hinged to the box, and the other end of the box cover is fixed to the front door by a locking piece.

[0013] Furthermore, support legs are symmetrically installed on the side wall near the top of the front door, a lock groove is provided on the side wall at one end of the box cover, a rectangular hole is provided in the lock groove, a boss is provided at one end of the support leg, one end of the support leg is located in the lock groove, and the boss is inserted into the rectangular hole.

[0014] Furthermore, an annular groove is provided on the top of the box cover, a through hole is provided in the annular groove, a cavity for installing a locking piece is provided below the annular groove, the through hole is communicated with the cavity, a notch is provided in the annular groove, an annular convex groove is provided between the cavity and the through hole, the notch is communicated with the annular convex groove, and the locking piece includes a rotating shaft, a connecting plate, and a spring, the connecting plate is installed in the cavity, one end of the spring is installed at one end of the connecting plate, and the other end of the spring is installed at the bottom of the cavity, one end of the rotating shaft passes through the annular groove and the through hole and is rotatably connected to the connecting plate, and a rotating knob is installed after the other end of the rotating shaft extends out of the annular groove, and a blocking tongue is symmetrically provided below the rotating knob, the blocking tongue corresponds to the notch, and the blocking tongue enters the annular convex groove through the notch and is clamped with the top of the annular convex groove.

[0015] Furthermore, a clamping column is provided at the bottom of the connecting plate, a locking opening corresponding to the clamping column is provided at the bottom of the box cover, the locking opening is communicated with the rectangular hole, and a locking hole corresponding to the clamping column is provided on the boss of the supporting leg.

[0016] Furthermore, a stop column is installed on the side wall of the front door, and grooves corresponding to the two ends of the stop column are provided on the side wall of the front door. One end of the stop column is hinged to the front door, and the other end is installed in the groove.

[0017] Compared with the prior art, the tensile gauge for building anchoring steel bars created by the present invention has the following advantages:

[0018] (1) The tensile gauge described in the present invention is integrated with the box body, which solves the hygiene problem of the tensile gauge and is extremely convenient to use. All the detection parts are collected in the box body, and the accommodating space is divided into upper and lower chambers. Since the oil pipe is made of soft material, the required space is relatively saved. Dividing it into two accommodating chambers for detection parts is convenient for saving space.

[0019] (2) The front door of the present invention is provided with a support assembly to facilitate the protection of the pressure rod during use of the manual pump, and the height of the support assembly is adjusted according to the height of the pressure rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0021] Figure 1 The invention creates an overall structure of a tensile gauge for building anchoring steel bars according to an embodiment of the invention. Figure 1 ;

[0022] Figure 2 The invention creates an overall structure of a tensile gauge for building anchoring steel bars according to an embodiment of the invention. Figure 2 ;

[0023] Figure 3 A tensile gauge box cover and front door opening structure for building anchoring steel bars according to an embodiment of the present invention Figure 1 ;

[0024] Figure 4 A tensile gauge box cover and front door opening structure for building anchoring steel bars according to an embodiment of the present invention Figure 2 ;

[0025] Figure 5 A structural diagram of a tensile meter for building anchoring steel bars with its rear door opened according to an embodiment of the present invention;

[0026] Figure 6 A side view of an open structure diagram of a tensile gauge for building anchoring steel bars according to an embodiment of the present invention;

[0027] Figure 7 A side sectional view of a case cover according to an embodiment of the present invention.

[0028] Description of reference numerals:

[0029] 1. Box body; 2. Box cover; 3. Front door; 4. Support leg; 5. Rear door; 6. Support assembly; 7. Fuel tank; 8. Manual pump; 9. Accommodating chamber; 11. Locking adjustment head; 12. Retraction groove; 13. Lock tongue; 21. Annular groove; 22. Lifting handle; 23. Locking piece; 24. Locking groove; 211. Notch; 212. Annular convex groove; 231. Stop tongue; 232. Rotating shaft; 233. Connecting plate; 234. Spring; 235. Locking mouth; 236. Clamping column; 31. Support member placement groove; 32. Stopping column; 41. Locking hole; 51. Clamping slot; 52. Moving mouth; 61. Adjustment piece; 62. Support plate; 71. Pressure rod groove; 81. Pressure rod; 82. Rotating head; 83. Pressure head. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0032] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0034] like Figures 1 to 7As shown, a tensile gauge for building anchoring steel bars comprises a suitcase, an oil tank 7 installed in the suitcase, a manual pump 8, and a receiving cavity 9 for placing a detection part;

[0035] The suitcase comprises a box body 1, a front door 3 installed at the front end of the box body 1, and a box cover 2 installed on the top of the box body 1, wherein the front door 3 and the box cover 2 are fixed by the cooperation of a locking member 23 and a supporting leg 4;

[0036] The oil tank 7 and the accommodating chamber 9 are respectively arranged in the box body 1. The manual pump 8 is installed at one end of the oil tank 7 and is located in the box body 1. One end of the manual pump 8 penetrates the side wall of the box body 1 and extends out of the oil outlet pipe, and the manual pump 8 is connected to the detection part through the oil outlet pipe.

[0037] like Figure 3 , Figure 4 , Figure 5 As shown, a pressure head 83 is installed on the top of the manual pump 8, and a rotating head 82 is installed on the pressure head 83. The pressure head 83 is vertically arranged with the manual pump 8. One end of the rotating head 82 is connected with a pressure rod 81. The oil tank 7 is provided with a pressure rod groove 71. The pressure rod 81 is rotated and installed into the pressure rod groove 71 through the rotating head 82.

[0038] An oil filling hole is extended through the box body 1 on one side of the oil tank 7 to facilitate refueling into the oil tank 7. A pressure relief valve is provided on the side wall of the manual pump 8. The specific use and installation method of the pressure relief valve adopt the existing technology. One end of the manual pump 8 extends through the side wall of the box body 1 and is provided with an oil outlet hole for installing an oil pipe. The oil outlet hole is not drawn in the figure.

[0039] like Figure 3 , Figure 4 As shown, a support assembly 6 is installed on the side wall of the front door 3, a support assembly installation groove is provided on the side wall of the front door 3, the support assembly 6 is installed in the support assembly installation groove, one end of the support assembly 6 is hinged to the support assembly installation groove, the support assembly 6 includes an adjustment rod, an adjustment member 61 for adjusting the height of the adjustment rod, a support plate 62 is installed at one end of the adjustment rod, a groove corresponding to the pressure rod 81 is provided on the top of the support plate 62, and the pressure rod 81 is placed in the groove;

[0040] When the support assembly 6 is propped up, in order to prevent the support assembly 6 from closing automatically, a stop column 32 is provided on the upper side wall of the front door, one end of the stop column 32 is hinged to the front door, and the other end is installed in the groove.

[0041] like Figure 3As shown, since the front door 3 installed on the front side wall of the box body 1 is at a certain distance from the bottom of the box, the front door 3 needs to remain parallel when using the support assembly 6, so the support legs 4 support the box door, and anti-slip pads are provided at the bottom of the support legs 4 to prevent sliding. The support assembly 6 is used to support the pressure rod 81. Since the pressure rod 81 is set to be foldable, when the pressure rod 81 is taken out for use, the height of the support rod can be adjusted according to the degree of depression of the pressure rod 81.

[0042] The detection parts include a reaction force support ring, an anchor, an oil cylinder, and an oil pipe. The accommodating chamber 9 includes a top chamber and a bottom chamber. The top chamber is provided with a reaction force support ring placement groove, an anchor placement groove, and an oil cylinder placement groove. The support ring, anchor, and oil cylinder are placed in the top chamber respectively, and the oil pipe is placed in the bottom chamber. The rear wall of the box body 1 is provided with an opening corresponding to the bottom chamber, and a rear door 5 is installed at the opening of the rear wall of the box body 1.

[0043] like Figure 5 As shown, a fixing piece is installed on the rear wall of the box body 1, and a card slot 51 for fixing the fixing piece is provided on the rear door 5. The fixing piece includes a locking adjustment head 11 and a lock tongue 13. A retraction groove 12 is provided at the opening of the rear wall, and a through hole communicating with the retraction groove 12 is provided on the rear wall. One end of the locking adjustment head 11 passes through the through hole and is fixedly connected with the lock tongue 13. The lock tongue 13 is located in the retraction groove 12. The size of the lock tongue 13 corresponds to the size of the retraction groove 12. The card slot 51 is set at the top of the rear door 5, and the lock tongue 13 is snapped into the card slot 51.

[0044] like Figure 1 , Figure 2 , Figure 5 As shown, since the rear door 5 is completely embedded in the rear wall of the box body 1, the fixing piece is installed at the top of the opening, the card slot 51 is set at the top of the rear door 5, and the side wall of the rear door 5 is provided with a moving opening 52. The rear door 5 is opened or closed through the moving opening 52, and the rotation of the locking tongue 13 is controlled by rotating the locking adjustment head 11, so that the locking tongue 13 is engaged in the card slot 51 or retracted into the retraction groove 12, thereby fixing the rear door 5.

[0045] like Figure 3 , Figure 4 , Figure 5 As shown, the front wall of the box body 1 is open, the top of the box body 1 is connected to the front end of the box body 1, the front door 3 is rotatably mounted on the two side walls near the lower end of the box body 1, one end of the box cover 2 is hinged to the box body 1, and the other end of the box cover 2 is fixed to the front door 3 through a locking member 23.

[0046] A support leg 4 is symmetrically mounted on the side wall near the top of the front door 3. A lock slot 24 is provided on the side wall at one end of the box cover 2. A rectangular hole is provided in the lock slot 24. A boss is provided at one end of the support leg 4. One end of the support leg 4 is located in the lock slot 24. The boss is inserted into the rectangular hole.

[0047] The support leg 4 is rotatably mounted on the front door 3. When the front door 3 is closed and fixed to the box cover 2, the support leg 4 is rotated to be inserted into the lock slot 24 on the side wall of the box cover 2, and the boss on the support leg 4 is inserted into the rectangular hole in the lock slot 24.

[0048] like Figure 6 As shown, the top of the box cover 2 is provided with an annular groove 21, a through hole is provided in the annular groove 21, a cavity for installing a locking member 23 is provided below the annular groove 21, the through hole is communicated with the cavity, a notch 211 is provided in the annular groove 21, an annular convex groove 212 is provided between the cavity and the through hole, the notch 211 is communicated with the annular convex groove 212, the locking member 23 includes a rotating shaft 232, a connecting plate 233, and a spring 234, the connecting plate 233 is installed in the cavity, one end of the spring 234 is installed in the connecting plate The plate 233 has one end, and the other end of the spring 234 is installed at the bottom of the cavity. One end of the rotating shaft 232 passes through the annular groove 21 and the through hole and is rotatably connected to the connecting plate 233. The other end of the rotating shaft 232 extends out of the annular groove and is installed with a rotating knob. The rotating shaft 232 is symmetrically provided with a stop tongue 231 below the rotating knob. The stop tongue 231 corresponds to the notch 211. The stop tongue 231 enters the annular convex groove 212 through the notch 211 and is clamped with the top of the annular convex groove 212.

[0049] like Figure 7 As shown, a clamping column 236 is provided at the bottom of the connecting plate 233 , a locking port 235 corresponding to the clamping column 236 is provided at the bottom of the box cover 2 , the locking port 235 is communicated with the rectangular hole, and a locking hole 41 corresponding to the clamping column 236 is provided on the boss of the supporting leg 4 .

[0050] By pressing the rotating knob, the connecting plate 233 squeezes the spring 234 , and the clamping column 236 at the bottom of the connecting plate 233 passes through the locking port 235 and is clamped into the locking hole 41 on the boss of the supporting leg 4 to fix the supporting leg 4 .

[0051] The display screen and switch of the dynamometer are located next to the manual pump 8. The present invention mainly improves the installation method of the pressure rod 81 of the manual pump 8 of the dynamometer, and does not improve the function of the dynamometer. The function of the dynamometer and the internal connection method all adopt the existing technology.

[0052] The specific usage process is as follows:

[0053] A carrying handle is provided on the top of the box cover 2 to facilitate the movement of the dynamometer. The box body 1 is placed near the steel bars to be tested, and the rotating knob on the top of the box cover 2 is rotated to make the tongue 231 on the rotating shaft 232 slide into the notch 211. The tongue 231 pops out along the notch 211, and the spring 234 in the box cover 2 pops up. The connecting plate 233 moves upward as a whole, and the clamping column 236 on the connecting plate 233 bounces back into the lock 235. At this time, the supporting legs 4 are pushed apart to make the supporting legs 4 disengage from the locking groove 24. At this time, the front door 3 is opened by pulling the two supporting legs 4. The supporting legs 4 support the front door 3 for balance. The support assembly 6 of the front door 3 is opened, the height of the adjusting rod is adjusted, the pressure rod 81 is taken out of the pressure rod 81 placement groove, and the pressure rod 81 is placed on the support plate 62 of the support assembly 6.

[0054] Take out the test parts, install them on the steel bars, rotate the locking adjustment head 11 on the rear wall of the box 1 to make the lock tongue 13 bounce back into the retraction groove 12, open the rear door 5 through the opening 52 to take out the oil pipe, install the oil pipe, and test it.

[0055] After use, the detection assembly is disassembled, placed back into the box body 1, and the front door 3 and the rear door 5 are closed.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A tensile gauge for building anchor steel bars, Features: It comprises a suitcase, an oil tank (7) installed in the suitcase, a manual pump (8), and a receiving cavity (9) for placing a detection part; The suitcase comprises a case body (1), a front door (3) mounted at the front end of the case body (1), and a case cover (2) mounted on the top of the case body (1), wherein the front door (3) and the case cover (2) are fixed by the cooperation of a locking member (23) and a supporting leg (4); The oil tank (7) and the accommodating chamber (9) are respectively arranged in the box body (1); a manual pump (8) is installed at one end of the oil tank (7) and is located in the box body (1); one end of the manual pump (8) penetrates through the side wall of the box body (1) and extends out of an oil pipe, and the manual pump (8) is connected to the detection part through the oil pipe; A support leg (4) is symmetrically mounted on the side wall of the front door (3) near the top, a lock slot (24) is arranged on the side wall at one end of the box cover (2), a rectangular hole is arranged in the lock slot (24), a boss is arranged at one end of the support leg (4), one end of the support leg (4) is located in the lock slot (24), and the boss is inserted into the rectangular hole; The top of the box cover (2) is provided with an annular groove (21), a through hole is provided in the annular groove (21), a cavity for installing a locking member (23) is provided below the annular groove (21), the through hole is communicated with the cavity, a notch (211) is provided in the annular groove (21), an annular convex groove (212) is provided between the cavity and the through hole, the notch (211) is communicated with the annular convex groove (212), the locking member (23) comprises a rotating shaft (232), a connecting plate (233), and a spring (234), the connecting plate (233) is installed in the cavity, one end of the spring (234) is installed on the connecting plate (233), and the locking member (233) is provided with a rotating shaft (232), a connecting plate (233), and a spring (234), the connecting plate (233) is installed in the cavity, and one end of the spring (234) is installed on the connecting plate (233). One end of the connecting plate (233) and the other end of the spring (234) are installed at the bottom of the cavity; one end of the rotating shaft (232) passes through the annular groove (21) and the through hole and is rotatably connected to the connecting plate (233); the other end of the rotating shaft (232) is extended out of the annular groove and is installed with a rotating knob; the rotating shaft (232) is symmetrically provided with a stop tongue (231) below the rotating knob; the stop tongue (231) corresponds to the notch (211); the stop tongue (231) enters the annular convex groove (212) through the notch (211) and is clamped with the top of the annular convex groove (212); A clamping column (236) is provided at the bottom of the connecting plate (233), a locking opening (235) corresponding to the clamping column (236) is provided at the bottom of the box cover (2), the locking opening (235) is communicated with the rectangular hole, and a locking hole (41) corresponding to the clamping column (236) is provided on the boss of the supporting leg (4).

2. A tensile gauge for building anchoring steel bars according to claim 1, Features: A pressure head (83) is installed on the top of the manual pump (8), a rotating head (82) is installed on the pressure head (83), the pressure head (83) is vertically arranged with the manual pump (8), one end of the rotating head (82) is connected with a pressure rod (81), a pressure rod groove (71) is provided on the oil tank (7), and the pressure rod (81) is rotated and installed in the pressure rod groove (71) through the rotating head (82).

3. A tensile gauge for building anchoring steel bars according to claim 2, Features: A support assembly (6) is installed on the side wall of the front door (3), a support assembly installation groove is provided on the side wall of the front door (3), the support assembly (6) is installed in the support assembly installation groove, one end of the support assembly (6) is hinged to the support assembly installation groove, the support assembly (6) comprises an adjustment rod, an adjustment member (61) for adjusting the height of the adjustment rod, a support plate (62) is installed at one end of the adjustment rod, a groove corresponding to the pressure rod (81) is provided on the top of the support plate (62), and the pressure rod (81) is placed in the groove.

4. A tensile gauge for building anchoring steel bars according to claim 1, Features: The detection parts include a reaction force support ring, an anchor, an oil cylinder, and an oil pipe. The accommodating chamber (9) includes a top chamber and a bottom chamber. The top chamber is provided with a reaction force support ring placement groove, an anchor placement groove, and an oil cylinder placement groove. The support ring, anchor, and oil cylinder are respectively placed in the top chamber, and the oil pipe is installed in the bottom chamber. The rear wall of the box body (1) is provided with an opening corresponding to the bottom chamber, and a rear door (5) is installed at the opening of the rear wall of the box body (1).

5. A tensile gauge for building anchoring steel bars according to claim 4, Features: A fixing piece is installed on the rear wall of the box body (1), and a slot (51) for fixing the fixing piece is provided on the rear door (5), the fixing piece comprises a locking adjustment head (11) and a lock tongue (13), a retraction groove (12) is provided at the opening of the rear wall, a through hole communicating with the retraction groove (12) is provided on the rear wall, one end of the locking adjustment head (11) passes through the through hole and is fixedly connected with the lock tongue (13), the lock tongue (13) is located in the retraction groove (12), the size of the lock tongue (13) corresponds to the size of the retraction groove (12), the slot (51) is arranged at the top of the rear door (5), and the lock tongue (13) is snapped into the slot (51).

6. A tensile gauge for building anchoring steel bars according to claim 1, Features: The front wall of the box body (1) is open, the top of the box body (1) is connected to the front end of the box body (1), the front door (3) is rotatably mounted on the box body (1) on the two side walls near the bottom, one end of the box cover (2) is hinged to the box body (1), and the other end of the box cover (2) is fixed to the front door (3) by a locking member (23).

7. A tensile gauge for building anchoring steel bars according to claim 1, Features: A stop column (32) is installed on the side wall of the front door (3). The side wall of the front door (3) is provided with grooves corresponding to the two ends of the stop column (32). One end of the stop column (32) is hinged to the front door, and the other end is installed in the groove.

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