TW591168B - Top pivot - Google Patents

Abstract

The present invention is to provide a top pivot which can be installed in a dark atmosphere. By operator's hand feeling, it is certainly judged whether or not installation of a door using the top pivot is achieved. A top pivot which consists of main portion and base portion, is to install the main portion on upper edge of the door, or to install the main portion on an upper frame of a building which is opposite to the upper edge of the door, and the base portion is installed on the upper frame and upper edge of the door, which faces the building. A shaft of the main portion engages with a bearing installed on the base portion using function of an arm installed on the main portion, characterized in that the arm is provided with a protrusion, and when the shaft is entirely inserted into the bearing, then the protrusion has a protrusion length from a hole which passes through a hinge of the main portion.

Description

591168 V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a device for fitting the door of a frame on the side of a building rotatably on the axis of a frame to confirm the function of the top pivot. In particular, in places such as dim work sites, the feel of the hand alone can reliably determine whether the top pivot has been installed by the top pivot, and furthermore, it is related to a shaft that is useful for operating the top pivot. The top pivot of the loosening prevention mechanism of the spiral member above and below the arm 0 [prior art] As far as the hinge parts of the upper frame that can simply mount the door to the opening of the building are described, for example, this patent is fair 1 to 3 Pivot hinges (hereinafter referred to as top pivots) described in No. 9346 and the like are well known. Such a top pivot usually consists of a main body portion of an upper frame installed on a frame above the door or a building opening facing the upper end of the door, and an upper frame or door opposite to the main body portion and installed on the open side of the object side. The base of the upper end. An example of this type of top pivot is described with reference to the drawings. Figure 14 is a plan view of the main part of the top pivot, and Figures 1: 5 show the state in which the door is installed in the frame of the opening of the building according to the same top pivot. Section view. In the figure, 1! 31 is the hinge plate, 102 is the shaft storage guide 103 fixed to the hinge plate by appropriate means. 103 1 The shaft is stored in the i land storage guide 102, and 104 is installed on the hinge plate. The support plate 105 of K 31 is an arm which is oscillatedly held by the horizontal axis 106 and is engaged with the shaft 103, and 107 is connected at an end opposite to the shaft 1 1 33 by an appropriate means, so that The spiral member 5 of which the arm 105 swings in the up-and-down direction constitutes the main body of the top pivot according to this -3. 591168 V. Description of the invention (2) The shaft accommodating guide 102 is formed with an opening 102a for allowing the arm to move up and down, and the opening 102a is made in the state where the shaft 105 is coupled with the arm 105. The shaft is shaken up and down to form the shaft ι03 which can be up and down in the shaft storage guide 丨 〇2. The spiral member 107 is screwed to the hinge plate 101, and the spiral member 107 rotates up and down in the figure according to the rotation of the spiral member 107, and the arm 105 can swing about the horizontal axis 106 as the center. Also, a protrusion 105a is formed on the side of the arm 105 facing the hinge plate 101, and a through-hole 101a is formed in the hinge plate 101, and the same protrusion 105a is fitted in the same. In the figure, 1 1 1 is a decorative plate of the main body part, and a hole 1 1 1 a for visual observation is formed on the decorative plate at a position facing the through hole. The state of the main body of the top pivot before the door is installed and fixed in the frame formed on the opening formed on the side of the building. The arm 105 is based on the function of the spiral member 107, as shown in the chain state in the figure. , The state of lifting the shaft upward. At this time, the shaft 10 03 is stored in the shaft storage guide 102. Further, a base system of a shaft 103 which is disposed opposite to the main body portion and supports the top pivot is composed of a base plate 108, a bearing holding material 10 fixed to the base plate 108, and a bearing holding material 1 0 9 and a bearing 1 1 0 which is fitted with a shaft supporting a shaft 103 of the body portion side. The state before the door was installed at the base was fixed to the upper end of the door. When using the top pivot to assemble the door in the frame of the opening of the building, first, the main part of the top pivot is mounted on the opening on the side of the building with the arm 105 as the chain line shown in Fig. 15 Above the frame. And will be installed

591168 V. Description of the invention (3) The door with the base plate 108 is configured to open the door in the opening on the building side so that the position of the bearing 1 10 at the base and the shaft 103 of the main body are matched. In this state, when the screw member 107 of the main body of the top pivot is screwed in using a screwdriver or the like, the end of the arm 105 connected to the screw member 107 is moved upward in the figure, and The shaft 103 to which the arm 105 is coupled moves downward and fits into the bearing 1 10 as shown by the solid line in FIG. 15. When the screw member 107 is completely locked inside, the shaft 103 is completely housed in the bearing 110, and the door installation operation is completed at this time. In this state, the protrusion 1 0a formed in the arm is inserted into the hole 1 01a formed by the penetrating hinge plate 1 01, and the state is that the hole 1 1 1 a formed through the decorative plate can be visually applied. confirm. [Problems to be Solved by the Invention] However, as described above, the conventional top pivot which has a state in which a protrusion system formed on an arm has been inserted into a hole formed by a penetrating hinge plate has been visually confirmed to complete the operation. The following are inappropriate. That is, when the door installation operation is now performed in a dim environment, as long as the lighting is not used to illuminate the work site, the condition of the protrusion formed on the arm entering the hole cannot be confirmed visually and reliably. The problem of having to prepare special confirmation lamps at the job site is troublesome. In addition, after the door is installed in the frame of the opening of the building by using the top pivot, the door is used for a long period of time, and the spiral member 107 in the top pivot gradually loosens, causing problems such as rattling in the shaft. . Therefore, in the present invention, the door is mounted on the opening of the building using a top pivot.

V. Description of the invention (4) In the case of the mouth, even at a dim work site, by providing a tactile sensation to confirm whether the installation of the door has been carried out, the purpose is to solve the problem. Furthermore, the loosening prevention mechanism provided with the spiral member because the top pivot is used to prevent the screw member 107 in the top pivot from becoming loose even if the door is used for a long period of time. [Means for solving the problem] For this reason, the means for solving the problem adopted by the present invention is a top pivot composed of a main body portion and a base portion, and the main body portion is installed at the upper end of the door or opposite to the upper end of the door. The upper frame on the building side, and the base is installed on the upper frame or the upper end of the door facing the building, and the shaft of the main body is fitted to the bearing provided on the base according to the function of the arm provided on the main body It is characterized in that the arm is provided with a protrusion, and when the protrusion is attached to the shaft completely embedded in the bearing, it has a characteristic that it protrudes from a hole formed by a hinge plate penetrating the body portion. Moreover, the protrusion is a characteristic pivot pin more prominently than the decorative plate mounted on the hinge plate of the main body portion. In the state where the main body portion is mounted on the upper end of the door for use, the screw member has a fitting portion to be fitted with a tool, and a characteristic pivot is formed on the side of the door so that a working hole can be inserted into the tool. axis. A top pivot composed of a main body portion and a base portion, which is installed on the upper end of the door or on the upper frame side of the building opposite to the upper end of the door, and the base portion is installed on the upper frame facing the building side. The upper end of the or door, and the arm provided on the main body part is moved by the spiral member, so that the shaft of the main body part is fitted to 591168 V. Description of the invention (5) The bearing provided on the base part constitutes a top pivot, the top pivot has The spiral member has a feature of preventing loosening. A top pivot composed of a body portion and a base portion is an upper frame on which the body portion is installed on the door 5 or the women's clothing is on the side of the building opposite the upper end of the door, and the base portion is installed on the side of the building facing The upper end of the upper frame or door is pivoted on the arm of the main body part according to the spiral member to fit the shaft of the main body part to the bearing provided on the base part to form a top pivot. The top pivot has the spiral member to prevent loosening. At the same time, the arm is provided with a protrusion, and when the shaft is completely embedded in the bearing, the protrusion has a top pivot which is characterized by a length protruding from a hole formed by a hinge plate penetrating the body portion. The loosening prevention mechanism of the spiral member is composed of a buckle fitted to the spiral member and a member that prevents the buckle from rotating. The buckle is rotated integrally with the spiral member when the spiral member is loosely rotated, and When the spiral member is rotated by the tool, only the spiral member can rotatably fit the buckle to its top pivot. In addition, the loosening prevention mechanism of the spiral member is provided with a fixing means for preventing the arm from swinging, and the fixing means can prevent the spiral member connected to the arm from loosening its top pivot with a characteristic tighter than the prescribed tightness. [Embodiment] The embodiment of the top pivot in the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of the top pivot of the first embodiment, and FIG. 2 is a shaft of the same top pivot. A sectional view of the state to support the door. In the figure, 1 is a hinge plate, 2 is a shaft accommodating guide fixed to the hinge plate, 3 is a shaft accommodating the shaft accommodating guide freely moving up and down, and 4 is

591168 V. Description of the invention (6) The support plate erected on the hinge plate 1, 5 is an arm held on the support plate 4 and articulated with the shaft 3 according to the horizontal axis 6, and 7 is connected with the The end of the arm on the opposite side of the shaft 3 is a spiral member for swinging the arm 5 in the vertical direction, and these form the main body part of the top pivot. The spiral member 7 is screwed to the hinge plate 1, and the spiral member 7 is moved up and down in the figure by rotating the spiral member 7 so that the arm 5 can swing about the horizontal axis 6 as a center. And 锷 7 a is formed on the head of the spiral member 7, so that 锷 7 a is engaged with the engaging portion 5 b formed on the arm 5 to perform the connection between the arm 5 and the spiral member 7. Further, a tool-fitting recessed portion 7b is formed on the bottom surface of the spiral member 7. The connection state of the arm 5 and the spiral member 7 is not limited to those shown in the figure, and other forms may be adopted if they can achieve the same function. An opening 2 a ′ for allowing the arm 5 to move up and down is formed in the shaft accommodating guide 2 as shown in the figure. The arm 5 is connected to the shaft 3, and the opening 2 a is shaken up and down to form The shaft 3 can be moved up and down inside the shaft storage guide 2. Moreover, a protrusion 5 a is formed on the side of the arm 5 opposite to the hinge plate 1. In addition, a through hole 1 a is formed in the hinge plate 1 to which the same protrusion is fitted, and a decorative plate Π is also formed with The through hole 1 a is the opposite hole ia. As shown in FIG. 2, when the door 5 is installed, the protrusion 5a is formed to extend through the hole 1 1a of the decorative plate 11 to form a protruding state. The state of the main body of the top pivot before the door is installed is to receive the recess in the upper frame fixed on the opening on the building side. The arm 5 is to raise the shaft 3 upward according to the spiral member 7 as shown in the figure to form the shaft 3 for storage In the shaft storage guide 2

591168 V. Description of invention (7) Status. The base of the shaft 3 which is arranged facing the body member and supports the top pivot is composed of a base plate 8 and a bearing holding member 9 fixed to the base plate 8 and a bearing 10 provided on the inner surface of the bearing holding member. Made up. This base is fixed to the upper end of the door before the door is installed. When the door is mounted on the opening of the building with the top pivot formed by this structure, first, the arm 5 is stored and fixed on the opening on the side of the building in the state shown in FIG. 1. Within the frame. The door on which the base plate 8 is installed is arranged so that the door is opened at the opening portion on the building side, so that the shaft 3 in the main body portion of the top pivot matches the position of the bearing 10 on the door side. In this state ', after the screw member 7 on the body side of the top pivot is screwed in, the end of the arm 5 moves upward, and the shaft 3 moves downward and fits into the bearing 10. When the screw member 7 is fully locked, the shaft 3 is completely housed in the bearing 10, and the door is installed in the state shown in FIG. 2. After this state is reached, the protrusions 5a formed on the arm 5 penetrate through the holes 1a, 11a5 formed in the hinge plate 1 and the decorative plate 11, and become slightly more convex than the decorative plate 11. In this way, the protrusions 5a may become protruding. Therefore, even at a dim work site, the protrusions 5a can be manually confirmed to protrude from the holes 1a and 1a, and it can be easily judged whether the door is completely installed. Next, a second embodiment will be described. The second embodiment is an example in which the main body of the top pivot is mounted on the upper end of the door, and the base is mounted on the opening above the frame. Fig. 3 shows the state where the door is supported by the top pivot of the second embodiment. 591168 Description of the Invention (8) A sectional view, and FIG. 4 is a plan view of the same top pivot. In addition, members corresponding to the first embodiment are designated by the same reference numerals. The main body of the top pivot formed by the aforementioned structure includes an arm and a shaft storage guide, and has a predetermined height Η (see Fig. 3). For this reason, when the height h of the upper frame of the opening on the building side where the door is to be installed is smaller than the height Η of the main body portion, the main body portion cannot be housed in the upper frame. Therefore, when the height h of the upper frame is small, it is necessary to mount the main body portion of the top pivot on the door side and the base portion to the frame on the opening portion. At this time, in order to rotate the spiral member with the main body part mounted on the door side, it is necessary to provide a space for inserting a tool for rotating the spiral member between the upper end and the ceiling. However, depending on the job site, sometimes such space cannot be taken. In addition, as in the second embodiment, when the main body of the top pivot is mounted on the upper end of the door, the protrusion formed on the arm has entered the hole due to the location of the installation. Identify unsuitable issues. Therefore, in the second embodiment, even when the distance L between the upper end of the door and the ceiling is short, in order to allow the spiral member attached to the main body portion of the door to be easily rotated, it is characterized in that the door is installed An engaging portion is provided in the hole, and the screw member is engaged with a tool entering from the working hole. In addition, since the basic structure and function of the second embodiment are the same as those of the first field mode, the features of the second embodiment will be mainly described here. The relationship between the length of the protrusion formed on the arm and the hinge plate, and the relationship between the spiral member and the hinge plate is the same as that of the first field form. In the second embodiment -10- 591168 5. In the description of the invention (9), the decorative plate is mounted on the base and is set to have no hole 1 1 a. In Fig. 3, the main body of the top pivot is mounted on the upper end of the door, and the base is mounted on the opening frame of the building. The screw member 7 is then locked in the same manner as in the first embodiment, so that the swing arm 5 is used to fit the shaft 3 to the bearing 10 of the base plate 8. However, in the second embodiment, it is assumed that the distance L between the upper end of the door and the ceiling is short. Therefore, the screw member 7 cannot be rotated by a tool such as a screwdriver. Therefore, in this embodiment, the outer peripheral shape of the spiral member 7a of the spiral member 7 is set to a polygonal shape, and a working hole 12 is formed on the door side at a position corresponding to the spiral member 7. Because of this, in this embodiment, a tool such as a wrench can be inserted into the working hole 12 to rotate the screw member 7, swing the arm 5, and insert the shaft 3 into the bearing 10. In addition, the rotation system of the spiral member 7 is not limited to a wrench. It is a mechanism that can achieve the same function. For example, a polygonal hole is opened in the spiral member 7. Since the polygonal hole is inserted into the tool 5, the spiral member can also be made. Spin. As described above, in the second embodiment, when the distance L from the upper end of the door to the ceiling is short, and even when the height of the frame above the opening of the building is insufficient, the top pivot can be simply installed. Moreover, the protrusion 5 a of the arm 5 is protruded by the holes 1 a and 1 1 a formed in the hinge plate 1 after the installation is completed. Therefore, even in a dim place, it can be easily felt by the hand. Check the installation status of the door. Next, a mechanism for preventing the loosening of the screw member 7 in the top pivot shaft by using the top pivot shaft after the door is installed behind the building 'will be described. -11168591168 V. Description of the invention (10) Figure 5 is a cross-sectional view of the first example of a mechanism for preventing loosening, Figure 6 is a plan view of Figure 5, and (A) is a position diagram of a buckle showing a normal state. (B) is a state diagram of the spiral member rotating in the arrow direction (loose direction), FIG. 7 is a cross-sectional view of the second example of the loosening prevention mechanism, and FIG. 8 is a cross-sectional view of the third example of the looseness prevention mechanism. Fig. 9 is a cross-sectional view of the fourth example of the loosening prevention mechanism, Fig. 10 is a cross-sectional view of the fifth example of the looseness prevention mechanism, and Fig. Π is a plan view of the decorative plate used in Fig. 10 Fig. 12 is a cross-sectional view of the sixth example of the loosening prevention mechanism, and Fig. 13 is an enlarged plan view of the fixing plate mounted on the arm used in Fig. 12; the following takes the first to sixth examples The sequence to explain the loosening prevention mechanism. It should be noted that members corresponding to the first embodiment use the same reference numerals, and the configuration and operation of the top pivot are not particularly different from those of the first embodiment, so these detailed descriptions are omitted. [The loosening prevention mechanism of the first example] In Fig. 5, 1 is a hinge plate, 2 is a shaft storage guide fixed to the hinge plate, and 3 is a shaft that can be freely stored in the shaft storage guide. , 4 is a support plate erected on the hinge plate 1, 5 is an arm held on the support plate 4 and articulated with the shaft 3 according to the horizontal axis 6, and 7 is connected opposite to the shaft 3 The end portion of the arm on the side is a spiral member for swinging the arm 5 in the up-and-down direction, so as to constitute the main body portion of the top pivot. The neck portion of the spiral member 7 is formed with a buckle 21 having a shape as shown in FIG. 6 (A). A groove 22 (refer to FIG. 5) to be fitted is formed in the groove 22, and the buckle 21 is fitted. With. One end of the buckle 21 is shown in FIG. 6 (A), and is formed to be longer than the other end-12-591168 V. Description of the invention (11) 'The extended end is formed to be embedded in the support plate 4 and the arm 5 within the gap 23 formed. The buckle 21 is fitted in the groove 22 of the spiral member 7 with a certain degree of friction. The friction force is set to 'when the spiral member 7 is rotated with a tool, and the screw member 7 can be rotated inside the buckle 21 when the hinge plate is screwed in. On the one hand, when the spiral member 7 is loosely rotated due to vibration and other factors, The frictional force of the buckle 2 and the spiral member 7 is integrally rotated. In addition, in the shaft housing guide 2, an opening 2a is formed that allows the arm 5 to move up and down similarly to the first embodiment. When the arm 5 is in the state of engaging the shaft 3, it is vertically moved in the opening 2a. When the shaft 3 is shaken, the shaft 3 can be moved up and down in the shaft storage guide 2. The base portion which is disposed to face the main body portion and which supports the shaft 3 of the top pivot is composed of a base plate 8, a bearing holding member 9 fixed to the base plate 8, and a bearing provided on the inner surface of the bearing holding member. 1 0. This base is fixed to the upper end of the door before the door is installed. The top pivot formed by this structure is the same as the first embodiment. After being placed in the frame above the opening on the building side, when the screw member 7 is further screwed into the main body of the top pivot, the end of the arm 5 The system moves upward and the shaft 3 moves downward and fits into the bearing 10. When the screw member 7 is completely locked, the shaft 3 is completely accommodated in the bearing 10, and the state shown in Fig. 5 is completed, and the door is installed. At this time, the screwing of the spiral member 7 is rotated by a force that overcomes the frictional force between the screw and the buckle 21 and is screwed. After this state, the protrusion 5a formed on the arm 5 penetrates the hinge plate 1 and is formed on the decoration.

-13- 591168 V. Description of the invention (12) The holes 1 a and 1 1 a of the plate 1 1 become slightly more convex than the decorative plate 丨 丨. In this way, the protrusions 5a are protruding, so that even at a dim work site, the protrusions 5a can be manually confirmed to protrude from the holes 1a, 1a, so that it can be easily determined whether the door is completely installed. In addition, when the door is used for a long period of time, when the spiral member 7 rotates in a loose direction (the direction of the arrow in FIG. 6 (B)) due to vibration and other factors, the buckle 21 fitted in the spiral member 7 also rotates with the spiral. The member 7 rotates together, but because one end of the buckle 21 is fitted in the gap 23 between the support plate 4 and the arm 5, the buckle 21 and the spiral member 7 are integrated and can only be in the gap range. Internal rotation, as a result, rotation of the spiral member 7 above it is prevented, and loosening of the spiral member 7 can be prevented. [Anti-loosening mechanism of the second example] The anti-loosing mechanism of the second example uses the top pivot to install the door on the opening on the building side, and the anti-loosening screw as a fixing means is screwed on the arm to prohibit it. The swing of the arm has a characteristic point that indirectly prevents the loosening of the spiral member. Here, the description will focus on the loosening prevention mechanism. In Fig. 7, spiral holes 25 are formed at appropriate positions on the side of the arm 5, and spiral holes 26 are formed in the hinge plate 1 facing the spiral holes 25 thereof. Further, a hole 1 1 b through which the loosening prevention screw 27 penetrates is formed in the decorative plate 11. The arm 5 is moved by the screw member 7 and the shaft 3 is moved downward and fitted in the bearing 10. When the door installation is completed, the anti-loosening screw 27 is provided by the hole 1 1 b of the decorative plate 11 Screwed into the screw hole 26 of the hinge plate 1 and the screw hole of the arm 5

-14- 591168 V. Description of the invention (13) 25. According to this, it is assumed that even if the spiral member 7 rotates in the loosening direction, the arm 5 does not move upward in the figure by the action of the loosening prevention screw 27, so the loosening of the spiral member 7 attached to the end of the arm 5 is suppressed. [Loosening prevention mechanism of the third example] The loosening prevention mechanism of the third example, after the door is installed on the opening of the building side according to the top pivot, uses a restraining screw as a fixing means to prevent the arm from swinging, and has an indirect prevention of the screw Loose feature points of components. The description will focus on the loosening prevention mechanism. In Fig. 8, a spiral hole 2 8 is formed at a position facing the arm at the appropriate place of the hinge plate i and the decorative plate (in this example, it is close to the spiral member 7). The arm 5 is moved by the screw member 7 and the shaft 3 is moved downward and fitted in the bearing 10. When the door is installed, the restriction screw 29 is penetrated through the hole 1 1 c formed in the decorative plate 11 On the other hand, the screw hole 28 is screwed into the spiral hole 28 formed in the hinge plate 1, and the screwing is not stopped until the end of the restricting screw 29 touches the underside of the arm 5. Accordingly, it is assumed that even if the spiral member 7 is rotated in the loosening direction, since the arm 5 does not move downward in the figure, the loosening of the spiral member 7 attached to the end of the arm 5 is suppressed. [The loosening prevention mechanism of the fourth example] The looseness prevention mechanism of the fourth example is provided with a flat-head screw after the door is installed on the opening on the building side by the top pivot, by screwing the screw hole 3 1 screwed into the screw member 7 30 is screwed together to prevent the structural feature of the spiral member 7 from loosening. The description will focus on the loosening prevention mechanism. In FIG. 9, the arm 5 is moved by the spiral member 7, and the shaft 3 is moved downward.

-15- 591168 V. Description of the invention (14) When the bearing 10 is moved and fitted into the bearing 10, the screw member 7 is locked under the end door installation state, and the screw hole 3 丨 on the hinge plate side is formed. In the space, another flat head screw 30 is screwed into the spiral hole 31 in the space. Accordingly, even if the screw member 7 is rotated in the loosening direction, the flat head screw 30 can be used to prevent the screw member 7 from loosening. [Loosening preventing mechanism of the fifth example] The loosening preventing mechanism of the fifth example has a feature that the movement of the shaft 3 is prohibited by using a decorative plate as a fixing means. As a result, the loosening of the spiral member is indirectly prevented. The description will focus on the loosening prevention mechanism. In Fig. 10, when the door is installed on the opening of the building side by the top pivot, the decorative plate Π will be fitted in advance on the outer peripheral surface of the shaft 3 in the top pivot facing the decorative plate 11 Ditch 3 a. In addition, as shown in FIG. 11, a fitting portion 1 1 d to be fitted in a groove of the shaft 3 and a passage portion 1 1 e of the protrusion 5a of the arm 5 are formed on the decorative plate 11 in advance. The arm 5 is moved by the screw member 7 and the shaft 3 is moved downward and fits into the bearing 10. After the door is installed, the decorative plate 11 is mounted on the hinge plate 1, but at this time, In a state where the fitting portion 1 1 d of the decorative plate 11 is fitted into the groove 3 a of the shaft 3, the decorative plate 11 is fixed by the screw 3 3 through the hole 1 1 f. Finally, since the movement of the shaft 3 is prohibited by the decorative plate 11, the loosening of the screw member 7 can be prevented. Further, if necessary, a groove lie, a long hole, a cutout, or the like may be formed in the decorative plate 11 to allow the protrusion 5a of the arm 5 to protrude. [6th example of loosening prevention mechanism]

-16- 591168 V. Description of the invention (15) The sixth example of the anti-loosing mechanism has a fixing plate mounted on the arm as a fixing means, and the fixing plate is fixed to the hinge plate to prevent the arm from swinging. The characteristic point is to prevent loosening of the spiral member indirectly. The description will focus on the loosening prevention mechanism. In Fig. 12, on the arm 5 of the top pivot, as shown in Fig. 13, a fixing plate 35 for fixing the movement of the arm is installed relative to the arm in a manner such as bonding, point-holding, and holding. The fixing plate 35 is formed in a shape of [], and both ends of the fixing plate 35 are bent outward, and a flange 3 6 is provided in parallel with the face of the hinge plate 1, and a spiral hole 38 is formed in the convex edge. A spiral hole 37 is formed at a position of the hinge plate 1 side facing the spiral hole 38 of the flange 36. The arm 5 is moved by the spiral member 7 and the shaft 3 is moved downward and fitted in the bearing 10. When the door is installed, the flange 3 6 formed on the fixed plate 3 5 abuts the hinge plate 1 The spiral holes 38 formed in the flange 36 and the spiral holes 37 formed in the hinge plate 1 are aligned. In this state, the mounting screw 34 penetrates the decorative plate 1 1 and is screwed on the lower side of the hinge plate 1 to fix the flange 36 to the hinge plate 1. As a result, the movement of the arm 5 is prohibited to prevent the spiral member 7 from loosening. Although the embodiment of the present invention has been described above, other mechanisms that can achieve the same function can be used for the rotation mechanism of the spiral member, the shape of the joint between the arm and the shaft, and the like. The loosening prevention mechanism of the spiral member 7 is of course applicable to the second embodiment. Further, the conventional loose pivot prevention mechanism of the spiral member can also be adopted. In addition, the present invention can be implemented in various forms without departing from the spirit or main features of the present invention. Therefore, the foregoing embodiments are merely examples.

-17- 591168 V. Description of the Invention (16) It has been explained without limitation. [Effects of the Invention] As described in detail above, according to the present invention, it is possible to reliably and simply determine whether the door is installed on the upper frame side of the building, especially at a dim work site or the like. In addition, when the distance from the upper end of the door to the ceiling is short, or when the height of the frame above the opening of the building is insufficient, the top pivot can be simply installed, and the door installation work can be facilitated. Furthermore, by providing the top pivot with a loosening prevention mechanism, even if the door is used for a long period of time, it is possible to obtain an excellent effect of reliably preventing loosening of the spiral member 107 in the top pivot. [Brief description of the drawing] [Figure 1] A cross-sectional view of the top pivot of the first embodiment. [Fig. 2] A sectional view of a state where the door is supported by the axis of the same top pivot. [Fig. 3] A cross-sectional view of a state where the top pivot supports the door according to the second embodiment. [Figure 4] A plan view of the same top pivot. [Fig. 5] A cross-sectional view of a top pivot body portion provided with the loosening prevention mechanism of the first example. [Fig. 6] Fig. 5 is a plan view of Fig. 5, where (A) shows a position of a buckle in a normal state '(B) is a state diagram in which a spiral member is rotated in an arrow direction (a loose direction). [Fig. 7] A top pivot body provided with a loosening prevention mechanism of the second example -18- 591168 5. Sectional view of part (17) of the invention description. [Fig. 8] A cross-sectional view of a top pivot body portion provided with a loosening prevention mechanism of a third example. [Fig. 9] A cross-sectional view of a top pivot main body including a loosening prevention mechanism of a fourth example. [Fig. 10] A cross-sectional view of a main body of a top pivot provided with a loosening prevention mechanism according to a fifth example. [Fig. 11] A plan view and a cross-sectional view of a decorative plate used in Fig. 10; [Fig. 12] A cross-sectional view of a main body of a top pivot provided with a loosening prevention mechanism according to a sixth example. [Fig. 13] An enlarged plan view of the arm-mounted fixing plate used in Fig. 12. [Fig. 14] A plan view of a conventional top pivot body portion. [Fig. 15] A cross-sectional view of a state in which a door is mounted on a frame of a building opening with the same pivot. [Symbol description] 1 hinge plate la hole 2 shaft storage guide 3 shaft 4 support plate 5 arm

591168 V. Description of the invention (18) 5a Protrusion 6 Horizontal shaft 7 Spiral member 8 Base plate 9 Bearing holding member 10 Bearing 11 Decorative plate 11 a Hole 12 Working hole · 2 1 Buckle 22 Groove 23 Gap 25, 26, 28, 3 1 27 Anti-loosening screw 29 Limit screw 30 Flat head screw 33 Screw 34 Screw 34 Mounting screw 35 Fixing plate 36 Flange 37 Screw hole -20-

Claims (1)

6. Patent application scope No. 9 1 1 1 7 3 3 3 "Top pivot" patent case (as amended on December 4, 1992) Six patent application scope: 1 · A top pivot, composed of the main body and the base The structure is that the main body part is installed on the upper end of the door or the upper frame on the side of the building opposite to the upper end of the door, and the base is installed on the upper frame of the building side or the upper end of the door, and is provided on the main body. The function of the arm of the part is to fit the shaft of the main body part to the bearing provided at the base part, characterized in that the arm is formed with a protrusion, and the m-protrusion is formed when the shaft is completely embedded in the bearing, and has a self-through body F The protruding length of the hole formed by the hinge plate. / Show 2 · If the top pivot of item 1 of the scope of patent application, the protrusion is more prominent than the decorative plate installed on the hinge plate of the main body. Case fc. If the top pivot of the scope of patent application item 1 or 2 is used, in a state where the main body portion is mounted on the upper end of the door for use, the spiral member has a fitting portion for tool fitting, and A Hi-work hole is formed on the side of the door where the tool can be inserted.牦 f · A top pivot, consisting of a main body and a base, is mounted on the upper end of the door or on the upper frame side of the building opposite the upper end of the door, and the base is installed on the facing building The upper frame on the side or the upper end of the door is moved by an arm provided on the main body portion by a spiral member, and the shaft of the main body portion is fitted to a bearing provided on the base portion to constitute a top pivot, characterized in that the top pivot has The loosening prevention mechanism of the spiral member. 5 _ —A kind of top pivot 'is composed of a body part and a base part, and the body part is installed 591168. The scope of the patent application is on the upper end of the door or the upper frame on the side of the building opposite the upper end of the door, and the base is installed. At the upper end of the upper frame or door facing the building side, the arm provided on the main body portion is shaken by a spiral member to fit the shaft of the main body portion to a bearing provided on the base portion to form a top pivot, which is characterized in that: The top pivot has a loosening prevention mechanism of the spiral member, and the arm is formed with a protrusion. When the shaft is completely embedded in the bearing, the protrusion has a length that protrudes from a hole formed by a hinge plate penetrating the body portion. . 6 · If the top pivot of item 5 of the patent application scope, wherein the preventive mechanism of the spiral member is composed of a buckle fitted in the spiral member and a member that prevents the buckle from rotating, the buckle system When the screw member is loosely rotated, the screw member rotates integrally with the screw member, and when the screw member is rotated by the tool, only the screw member is rotatably fitted to the buckle. 7. If the top pivot of item 5 of the patent application scope, wherein the loosening prevention mechanism of the spiral member has a fixing means for prohibiting the arm from swinging, according to this fixing means, the spiral member connected to the arm will not be tighter than specified. Degree is still loose.