KR100452476B1 - Top pivot - Google Patents

Abstract

The present invention is to provide a top pivot that can determine whether the door is attached by the top pivot reliably only at the touch of the hand in a slightly dark workplace, etc., consisting of a main body portion and a base portion, the main body portion of the top of the door Or it is attached to the building side frame opposite the upper end of the door, and is attached to the building side frame or the upper end of the door facing the base part, and the shaft of the main body part is fitted to the bearing installed in the base part by the action of the arm installed in the main body part. A top pivot constituting the pivot, wherein the arm is provided with a projection having a length protruding from a hole formed through the hinge plate 1 of the main body when the shaft is completely inserted into the bearing. It is a top pivot.

Description

Top Pivot {TOP PIVOT}

The present invention relates to a top pivot having a shaft alignment check function for rotatably supporting a door on a building-side upper frame. Particularly in a dark workplace, the present invention relates to a top pivot capable of determining whether or not a door is attached by a top pivot only with a hand touch, and furthermore, a screw member for moving up and down an arm for operating the axis of the top pivot. A top pivot provided with a locking mechanism.

Background Art [0002] For example, a pivot hinge (hereinafter referred to as a top pivot) described in, for example, Japanese Utility Model Publication No. 1989-39346 is known as a hinge part that enables the door to be easily attached to a building opening upper frame. The top pivot is usually composed of a main body portion attached to the upper part of the door or the top of the building opening facing the upper end of the door, and a base portion attached to the upper side of the opening top frame or the door on the opposite side opposite the main body portion.

An example of this type of top pivot is briefly described with reference to the drawings. Fig. 14 is a plan view of the main body of the top pivot, and Fig. 15 is a cross-sectional view of the door attached to the building opening frame by the top pivot.

In the figure, "101" is a hinge plate, "102" is an axis storage guide fixed to a hinge plate by a suitable means, "103" is an axis stored in the axis storage guide 102, "104" is a hinge plate ( 101, the support plate, which is installed upright, “105” is an arm which is freely held on the support plate 104 by the horizontal axis 106 and is engaged with the shaft 103, and “107” is the shaft 103. Is a screw member which is connected to the arm 105 by appropriate means at the end of the opposite side to swing the arm 105 in the vertical direction, and the main body portion of the top pivot is formed by these.

As shown in the figure, the slit 102a is formed to allow the arm to move up and down as shown in the figure, and the upper and lower sides of the slit 102a are in the state where the arm 105 engages the shaft 103. The shaft 103 can be moved up and down within the shaft storage inner guide 102 by swinging. In addition, the screw member 107 is screwed to the hinge plate 101, by rotating the screw member 107, the screw member 107 is moved up and down in the figure to move the arm 105 around the horizontal axis 106 It is a structure that can swing. The protrusion 105a is formed on the side opposite to the hinge plate 101 of the arm 105, and the through plate 101a is formed in the hinge plate 101 to sandwich the same protrusion 105a. In addition, "111" in the figure is a makeup plate of the main body portion, and the visual hole 111a is formed in a position facing the through hole.

In the state before the door is attached, the main body of the top pivot is received and fixed in the upper frame of the opening formed on the building side, and the arm 105 is shown in the double-dotted line state in the drawing by the operation of the screw member 107. The axis is pulled up. At this time, the shaft 103 is stored in the shaft storage guide 102.

The base portion, which is disposed opposite the main body portion and supports the shaft 103 of the top pivot, includes a base plate 108, bearing members 109 fixed to the base plate 108, and bearing bearings. It is comprised by the bearing 110 which is attached to the member 109, and supports the side shaft 103 of the said main-body part side. The base part is fixed to the upper end of the door in the state before attaching the door.

When the door is attached to the building opening frame using the top pivot, the main body portion of the top pivot is first attached to the upper frame of the building side opening in the state where the arm 105 is indicated by a double-dotted line in FIG. Further, the door with the base plate 108 is arranged so that the door is opened in the opening at the building side, and the bearing 110 of the base part is aligned with the shaft 103 of the main body part. In this state, if the screw member 107 of the main body of the top pivot is twisted using a tool such as a screwdriver, the end of the arm 105 connected to the screw member 107 moves upward in the drawing, and the arm 105 ) And the shaft 103 engaged with each other are moved downward and fitted to the bearing 110 as shown by the solid line in FIG. 15. When the screw member 107 is in a state of being tightly tightened, the shaft 103 is completely received into the bearing 110 and the attachment work of the door is completed. In this state, the projection 105a formed in the arm is inserted into the hole 101a formed through the hinge plate 101, and the state can be visually confirmed through the hole 111a formed in the decorative plate. It is supposed to be.

However, in the conventional top pivot which completes the work by visually confirming the state in which the protrusion formed in the arm penetrates the hole formed through the hinge plate, the following inconveniences occur.

In other words, when the installation site of the door is in a slightly dark environment, the projections formed on the arm cannot be surely seen with the naked eye unless the working area is illuminated by lighting, etc. There was a bother, such as the need to prepare the light.

In addition, after the door is attached to the building opening frame using the top pivot, if the door is used for a long period of time, inconvenience such as loosening of the screw member 107 in the top pivot and a rattling on the shaft occurs.

Therefore, the present invention solves the above problems by providing a top pivot which can confirm that the door is securely attached by the touch of the hand even when the door is attached to the opening of the building by using the top pivot. For the purpose of Furthermore, an object of the present invention is to provide a top pivot which can prevent loosening of the screw member 107 in the top pivot even when the door is used for a long time by providing a locking mechanism of the screw member in the top pivot.

The problem solving means employed by the present invention for this purpose,

It consists of a main body and a base, and attaches the main body to the building side frame opposite the top of the door or the top of the door, and attaches the base part to the building side frame or the top of the door facing the base, Is a top pivot which fits the shaft of the main body to the bearing provided in the base, and constitutes a pivot, and the arm protrudes from the hole formed through the hinge plate of the main body when the shaft is completely inserted into the bearing. The top pivot is characterized in that the projection having a.

The projection is a top pivot, characterized by protruding from a decorative plate attached to the main body hinge plate.

In the state where the main body is attached to the upper door and used, the screw member is provided with a fitting portion for fitting with the tool, and the saw side is provided with a work hole for inserting the tool. It is a pivot.

It is composed of a main body and a base, and attaches the main body to the building side frame opposite the top of the door or the top of the door, and attaches the base to the building side frame or the top of the door facing the base, A top pivot is a top pivot which constitutes a pivot by fitting the shaft of a main body part to the bearing body provided in the base part by moving by a screw member, The said top pivot is a top pivot characterized by including the locking mechanism of the said screw member.

It is composed of a main body and a base, and attaches the main body to the building side frame opposite the top of the door or the top of the door, and attaches the base to the building side frame or the top of the door facing the base, It is a top pivot which pivots by a screw member to fit the shaft of a main body part to the bearing installed in the base part, and the said top pivot is provided with the locking mechanism of the said screw member, and the said arm has the said shaft completely into the bearing. It is a top pivot characterized in that a projection having a length protruding from a hole formed penetrating through a hinge plate of the main body portion when it is fitted is formed.

The locking mechanism of the screw member is composed of a snap ring fitted to the screw member and a member for preventing rotation of the snap ring. The snap ring rotates integrally with the screw member when the screw member rotates by loosening. When the screw member is rotated by the tool, only the screw member is rotatably fitted with respect to the snap ring.

The locking mechanism of the screw member is provided with a fixing means for prohibiting swinging of the arm, and the screw member connected to the arm is prevented from loosening by more than a predetermined amount by the fixing means.

1 is a cross-sectional view of a top pivot according to a first embodiment.

2 is a sectional view of a state in which the door is supported by the axis of the same top pivot;

3 is a cross-sectional view of a state in which a door is supported by a top pivot according to a second embodiment.

4 is a plan view of the same top pivot.

5 is a sectional view of a main body of a top pivot provided with a locking mechanism of the first example;

Figure 6 is a plan view of Figure 5, (a) is a view showing the position of the snap ring in the normal state, (b) is a state in which the screw member is rotated in the direction of the arrow (unwinding direction).

Fig. 7 is a sectional view of the top pivot body portion provided with the locking mechanism of the second example.

Fig. 8 is a sectional view of the top pivot body portion provided with the locking mechanism of the third example. +

9 is a sectional view of a top pivot body part provided with a locking mechanism of a fourth example;

Fig. 10 is a sectional view of the top pivot body portion provided with the locking mechanism of the fifth example.

11 is a plan view and a sectional view of the decorative plate used in FIG. 10.

12 is a sectional view of a top pivot body part provided with a locking mechanism of a sixth example;

FIG. 13 is an enlarged plan view of a fixing plate attached to an arm used in FIG. 12. FIG.

14 is a plan view of a conventional top pivot body portion.

It is sectional drawing of the state which attached the door to the building opening frame by the same top pivot.

※ Explanation of symbols for main parts of drawing

1: hinge plate 1a: hole

2: shaft storage guide 3: shaft

4: support plate 5: arm

5a: protrusion 6: horizontal axis

7: screw member 8: base plate

9: bearing support member 10: bearing support

11: makeup plate 11a: hole

12: Work hole 21: Snap ring

22: home 23: gap

25, 26, 28, 31, 37: screw hole 27: locking screw

29: Stopper screw 30: Universal screw

33: Screw 34: Mounting Screw

35: fixed plate 36: flange

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a top pivot according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of a top pivot according to a first embodiment, and FIG. 2 is a cross-sectional view of a state where a door is supported by an axis of the same top pivot. .

In the drawings, "1" is a hinge plate, "2" is an axis storage guide fixed to the hinge plate, "3" is an axis freely housed in the shaft storage guide, "4" is mounted on the hinge plate (1) The supporting plate, “5”, is an arm that is freely held on the support plate 4 by the horizontal shaft 6 and is engaged with the shaft 3, and “7” is a side opposite to the shaft 3. It is connected to the end of the arm and is a screw member for swinging the arm 5 in the vertical direction, whereby the main pivot portion of the top pivot is constituted.

The screw member 7 is screwed to the hinge plate 1, the screw member 7 is moved up and down in the figure by rotating the screw member (7), the arm (5) to the horizontal axis (6) It is a structure that can swing to the center. In addition, a collar 7a is formed at the top of the screw member 7, and the collar 7a is engaged with the engaging portion 5b formed on the arm 5. The screw member 7 is connected. Moreover, the recessed part 7b to which a tool fits is formed in the bottom face of the screw member 7. In addition, the shape of the connection of the said arm 5 and the screw member 7 can also employ | adopt a different shape, as long as it can achieve the same function without restrict | limiting to what is shown in figure.

As shown in the figure, the slit 2a is formed in the shaft storing guide 2 to allow the arm 5 to move up and down, and the slit 2a is formed while the arm 5 is engaged with the shaft 3. By swinging the inside up and down, the shaft 3 can move up and down within the shaft storage guide 2. The protrusion 5a is formed on the side of the arm 5 that faces the hinge plate 1, and the hinge plate 1 is formed with a through hole 1a through which the same protrusion is inserted. Hole 11a is also formed in the plate 11 against the through hole 1a. As shown in Fig. 2, the projection 5a is formed to have a length that protrudes through the hole 11a of the decorative plate 11 when the door is completely attached.

In the state before attaching the door, the main pivot portion of the top pivot is housed and fixed to the recess in the upper frame of the opening on the building side, and the arm 5 is moved upward by the shaft 3 as shown by the screw member 7. The shaft 3 is pulled up and stored in the shaft storage guide 2.

A base portion disposed opposite to the main body portion and supporting the shaft 3 of the top pivot 8 with a base plate 8, a bearing holding member 9 fixed to the base plate 8, It consists of bearing 10 provided in the inner surface of bearing holding member. This base part is fixed to the upper end of the door in the state before attaching the door.

When the door is joined to the building opening frame by the top pivot having the above configuration, the main body portion of the top pivot is received and fixed in the upper frame of the building side opening as shown in FIG. Moreover, the door with the base plate 8 is arrange | positioned so that the door may be opened in the opening part of a building side, and the shaft 3 in the main-body part of a top pivot is adjusted to the position of the bearing 10 of a door side. When the screw member 7 on the main body side of the top pivot is twisted in this state, the end of the arm 5 moves upward, and the shaft 3 moves downward to fit the bearing 10. When the screw member 3 is in the state of being fully tightened, the shaft 3 is completely accommodated in the bearing 10 and will be in the state shown in FIG. 2, and attachment of a door will be completed. In this state, the projections 5a formed on the arm 5 penetrate through the holes 1a and 11a formed in the hinge plate 1 and the decorative plate 11 and protrude slightly from the decorative plate 11. It is in a state. In this way, the projections 5a protrude out, so even in a dark work site, the projections 5a protrude from the holes 1a and 11a by hand, thereby confirming whether the door is completely attached or not. It can be judged simply.

Next, a description will be given of the second embodiment. 2nd Embodiment is the example which attached the main body part of a top pivot to the upper end of a door, and attached the base part to the upper frame of an opening part, FIG. 3 is sectional drawing of the state supported by the top pivot which concerns on 2nd Embodiment, 4 is a plan view of the same top pivot. In addition, the same code | symbol is used for the member corresponding to 1st Embodiment.

The main pivot portion of the top pivot having the above-described configuration has a predetermined height H (see Fig. 3) including an arm and an axis storage guide. For this reason, when the height h of the upper frame of the opening part on the building side to which a door is attached is smaller than the height H of a main body part, a main body part cannot be accommodated in a top frame. Therefore, when the height h of the upper frame is small, it is necessary to attach the main body portion of the top pivot to the door side and the base portion to the upper frame of the opening portion. In this case, a space for inserting a tool for rotating the screw member between the top of the door and the ceiling is required to rotate the screw member in a state where the main body is attached to the door side. However, depending on the workplace, such space may not be available. Moreover, when attaching the main pivot part of the top pivot to the upper end of the door as in the second embodiment, there is an inconvenience that the situation in which the projection formed in the arm is inserted into the hole cannot be confirmed with the naked eye.

Thus, in the second embodiment, even when the distance L between the top of the door and the ceiling is short, a tool having a working hole in the door and a screw member inserted into the screw member from the working hole so that the screw member of the main body attached to the door side can be easily rotated. It is characterized by setting up the engaging part which fits into. In addition, since a 2nd embodiment has the basic structure and operation | work similar to 1st embodiment, it demonstrates centering on the characteristic part of 2nd embodiment here. The relationship between the length of the projection formed on the arm, the hinge plate, the screw member, and the hinge plate is the same as in the first embodiment. In the case of the second embodiment, the decorative plate is attached to the base portion, and there is no hole 11a.

In Fig. 3, the main pivot portion of the top pivot is attached to the upper end of the door, and the base portion is attached to the opening frame of the building. As in the first embodiment, the arm 5 is rocked by tightening the screw member 7 so that the shaft 3 is fitted to the bearing 10 of the base plate 8. However, in the second embodiment, since the distance L between the upper end of the door and the ceiling is short, the screw member 7 cannot be rotated by a tool such as a driver. Therefore, in this embodiment, the outer circumferential shape of the collar 7a of the screw member 7 is made into a polygon, and the work hole 12 is formed at the position corresponding to the screw member 7 on the door side. Thus, in this form, a wrench etc. can be inserted from the work hole 12, the screw member 7 may be rotated, the arm 5 may be rocked, and the shaft 3 may be inserted in the bearing 10. As shown in FIG. In addition, the rotation of the screw member 7 is achieved by drilling a polygonal hole in a mechanism capable of achieving the same function without being limited to a wrench, for example, the screw member 7, and inserting a tool into the polygonal hole. It is also possible to rotate the member.

As mentioned above, in 2nd Embodiment, even if the distance L from the upper end of a door to a ceiling is short, and the height of the upper frame of a building opening part is not enough, a door can be attached easily using a top pivot. In the attached state, the protrusion 5a of the arm 5 protrudes from the holes 1a and 11a formed in the hinge plate 1, so even in a dark place, the door can be easily checked with only the touch of the hand. Can be.

Subsequently, after the door is attached to the building opening portion by the top pivot, a locking mechanism that can prevent the screw member 7 in the top pivot from being loosened even if the door is used for a long time will be described.

Fig. 5 is a cross-sectional view of the locking mechanism as a first example, Fig. 6 is a plan view of Fig. 5, (a) shows the position of a snap ring in a steady state, and (b) the screw member is rotated in the direction of the arrow (unwinding direction). 7 is a sectional view as a second example of the locking mechanism, FIG. 8 is a sectional view as a third example of the locking mechanism, FIG. 9 is a sectional view as a fourth example of the locking mechanism, FIG. 10 is a sectional view as a fifth example of the locking mechanism, and FIG. 12 is a plan view of the makeup plate used in FIG. 10, FIG. 12 is a sectional view of a sixth example of the locking mechanism, and FIG. 13 is an enlarged plan view of a fixing plate attached to the arm used in FIG. 12. The locking mechanism will be described in sequence. In addition, the same code | symbol is used for the member corresponding to 1st Embodiment, and the structure and operation | movement of a top pivot do not change in particular with 1st Embodiment, and their detailed description is abbreviate | omitted.

[1st locking mechanism]

In Fig. 5, "1" is a hinge plate, "2" is an axis storage guide fixed to the hinge plate, "3" is a shaft freely housed in the axis storage guide, "4" is a hinge plate (1) The support plate, “5”, which is installed upright, is freely held on the support plate 4 by the horizontal shaft 6, and the arm that engages with the shaft 3, “7” is different from the shaft 3; It is connected to the end of the arm of the opposite side, and is a screw member for rocking the arm 5 in the up-down direction, and the main pivot part is comprised by these. The head 22 of the screw member 7 is formed with a groove 22 (see FIG. 5) to which the snap ring 21 of the shape shown in FIG. 6A fits, and a snap ring 21 is formed in the groove 22. Is fitted. One end of the snap ring 21 is formed to extend from the other end as shown in FIG. 6A, and the extended end thereof is fitted into the gap 23 formed between the support plate 4 and the arm 5. It is set to put. The snap ring 21 is fitted into the groove 22 of the screw member 7 with a certain amount of friction. The frictional force of the screw member 7 is rotated by the tool and the screw member 7 can rotate in the snap ring 21 when twisted into the hinge plate, while the screw member 7 is loosened and rotated by vibration or the like. In this case, the snap ring 21 and the screw member 7 are integrally set and set as a friction force to rotate. Moreover, the said slit 2a is formed in the said shaft storage guide 2 similarly to 1st Embodiment, and allows the up-down movement of the arm 5, and this slit in the state in which the arm 5 engaged the shaft 3 was engaged. (2a) By swinging the inside up and down, the shaft 3 can move up and down within the shaft storage guide 2.

A base portion disposed opposite to the main body portion for supporting the shaft 3 of the top pivot, a base plate 8, bearing members 9 fixed to the base plate 8, bearing members Consists of bearing 10 installed on the inner surface of the. This base part is fixed to the upper end of the door in the state before attaching the door.

The top pivot having the above-described configuration is arranged in the upper frame of the building-side opening portion in the same manner as in the first embodiment, and then the end of the arm 5 moves upward when the screw member 7 of the main body portion of the top pivot is twisted therein. (3) is moved downward to fit the bearing 10. When the screw member 7 is in the state of being fully tightened, the shaft 3 is completely accommodated in the bearing 10, and it will be in the state shown in FIG. 5, and attachment of a door will be completed. At this time, the twisting of the screw member 7 is rotated and twisted by a force that overcomes the frictional force with the snap ring 21. In this state, the projections 5a formed on the arm 5 penetrate through the holes 1a and 11a formed in the hinge plate 1 and the decorative plate 11 and protrude slightly from the decorative plate 11. It is in a state. In this way, the projection 5a is protruded, and even in a slightly dark work site, it is possible to confirm by hand that the projection 5a protrudes from the holes 1a and 11a, thereby confirming whether or not the door is completely attached. You can simply judge. If the screw member 7 is rotated in the direction in which the screw member 7 is released by vibration or the like (the arrow direction in FIG. 6B) while the door is being used for a long time, the snap ring 21 fitted to the screw member 7 also It rotates together with the screw member 7, and the snap ring 21 is screw member 7 because one end of the snap ring 21 is fitted into the gap 23 between the support plate 4 and the arm 5. ), The screw member 7 can be rotated only within the range of the gap, and as a result, the screw member 7 can be prevented from further rotation to prevent the screw member 7 from loosening.

[2nd locking mechanism]

The locking mechanism of the second example uses the top pivot to attach the door to the building side opening, and then locks the locking screw as a fixing means to the arm to prevent rocking of the arm and indirectly prevents loosening of the screw member. There is a characteristic. In addition, it demonstrates centering on a locking mechanism here.

In FIG. 7, the screw hole 25 is formed in the place of the arm 5 side, and the screw hole 26 is formed in the hinge plate 1 which opposes the screw hole 25. As shown in FIG. In addition, the decorative plate 11 is formed with a hole 11b through which the locking screw 27 penetrates. The arm 5 is moved by the screw member 7, the shaft 3 moves downward to fit the bearing 10, and the locking screw 27 is removed in the place where the door is completely attached. The screw holes 26 of the hinge plate 1 and the screw holes 25 of the arm 5 are screwed through the holes 11b of the decorative plate 11. In this way, even if the diarrhea screw member 7 is rotated in the disengaging direction, the arm 5 does not move upward in the drawing due to the action of the locking screw 27, so that the screw member is engaged with the end of the arm 5 ( The loosening of 7) is prevented.

[3rd locking mechanism]

The locking mechanism of the third example is characterized in that after the door is attached to the building side opening by the top pivot, the arm is prevented from swinging by using a stopper screw as a fixing means and indirectly prevents loosening of the screw member. Here, too, the locking mechanism will be described.

In FIG. 8, the screw hole 28 is formed in the position where the hinge plate 1 and the makeup plate 11 oppose the arm (in this example, right next to the screw member 7). The arm 5 is moved by the screw member 7, the shaft 3 is moved downward to fit the bearing 10, and the stopper screw 29 is removed at the place where the door is completely attached. When screwed into the screw hole 28 formed in the hinge plate 1 through the hole 11c formed in the decorative plate 11, and the end of the stopper screw 29 touches the lower surface of the arm 5 Twist it up. This prevents the loosening of the screw member 7 engaged with the end of the arm 5 because the arm 5 does not move downward in the drawing even when the diarrhea screw member 7 rotates in the disengaging direction.

[4th locking mechanism]

The locking mechanism of the fourth example loosens the screw member 7 by screwing the universal screw 30 into the screw hole 31 to which the screw member 7 is screwed after attaching the door to the building side opening by the top pivot. There is a feature in that the configuration prevented. Here, too, the locking mechanism will be described.

In Fig. 9, the arm 5 is moved by the screw member 7, the shaft 3 is moved downward to fit the bearing 10, and the screw is in a state where the attachment of the door is completed. As a result of the member 7 being clamped, a space is formed in the screw hole 31 formed on the hinge plate side, and the universal screw 30 of the separate body is screwed into the screw hole 31 of the space. By doing so, even if it is going to rotate in the direction of loosening the screw member 7, the loosening of the screw member 7 is prevented by the universal screw 30. FIG.

[5th locking mechanism]

The locking mechanism of the fifth example is characterized in that the movement of the shaft 3 is prevented by the makeup plate as the fixing means, and as a result, the screw member is indirectly prevented from loosening. Here, too, the locking mechanism will be described.

In Fig. 10, when the door is attached to the building side opening by the top pivot, the groove 3a is fitted into the outer circumferential surface of the shaft 3 in the top pivot opposite to the makeup plate 11. ) To form. Moreover, as shown in FIG. 11, on the makeup board 11, the fitting part 11d which fits in the groove | channel formed in the said shaft 3, and the passage part 11e of the protrusion 5a of the arm 5 are formed, Put it. The arm (5) is moved by the screw member (7), the shaft (3) moves downward to fit the bearing (10), and the decorative plate (11) in the place where the attachment of the door is finished. It attaches to the hinge plate 1, At this time, in the state which fitted the fitting part 11d of the makeup board 11 to the groove | channel 3a of the shaft 3, the makeup board 11 is made through the hole 11f. Secure with screw (33). As a result, since the movement of the shaft 3 is prohibited by the makeup plate 11, loosening of the screw member 7 can be prevented. In addition, the decorative plate 11 may be provided with a groove 11e or a long hole, a notch or the like that allows the protrusion 5a of the arm 5 to protrude as necessary.

[6th locking mechanism]

The locking mechanism of the sixth example is characterized in that a fixing plate as a fixing means is attached to the arm, and the fixing plate is fixed to the hinge plate to prevent rocking of the arm and indirectly to prevent loosening of the screw member. Here, too, the locking mechanism will be described.

In FIG. 12, as shown in FIG. 13, the fixing plate 35 which fixes the movement of an arm is attached to the arm 5 of a top pivot by adhesion | attachment, a spot, a fitting, etc. with respect to an arm. The fixing plate 35 is formed in a U-shape, bent at both ends thereof to the outside to bend to provide an attachment flange 36 parallel to the surface of the hinge plate 1, and to form a screw hole 38 in the flange. Moreover, the screw hole 37 is formed in the position which opposes the screw hole 38 of the flange 36 at the hinge plate 1 side. The arm 5 is moved by the screw member 7, the shaft 3 moves downward to be engaged with the bearing 10, and when the door is in the attached state, the fixing plate 35 is formed. The flange 36 abuts on the surface of the hinge plate 1, and the screw holes 37 formed in the hinge plate 1 coincide with the screw holes 38 formed in the flange 36. In this state, the attachment screw 34 is screwed through the decorative plate 11 from the lower surface side of the hinge plate 1, and the flange 36 is fixed to the hinge plate 1. As a result, the movement of the arm 5 is prohibited and the loosening of the screw member 7 is prevented.

As mentioned above, although embodiment which concerns on this invention was described, the rotation mechanism of a screw member, the engaging part shape of an arm, and a shaft etc. can employ | adopt the other mechanism which can achieve the same function. It is obvious that the locking mechanism of the screw member 7 can also be applied to the second embodiment, and furthermore, the locking mechanism of the screw member can also be employed in a conventional top pivot.

In addition, this invention can be implemented in other various forms, without deviating from the mind or main characteristic of this invention, Therefore, the said Example is only an illustration at all points and is not interpreted limitedly.

As described in detail above, according to the present invention, it is possible to easily determine whether or not the door is attached to the building-side upper frame reliably only by the touch of the hand, especially in a slightly dark workplace. In addition, even when the distance from the upper end of the door to the ceiling is short, or when the height of the upper frame of the building opening is not sufficient, the top pivot can be easily attached, thereby facilitating the attachment work of the door.

Moreover, by providing the locking mechanism in the top pivot, even when the door is used for a long time, it is possible to reliably prevent the loosening of the screw member 107 in the top pivot.

Claims (7)

It consists of a main body and a base, and attaches the main body to the building side frame opposite the top of the door or the top of the door, and attaches the base part to the building side frame or the top of the door facing the base, Is a top pivot which fits the shaft of the main body to the bearing provided in the base, and constitutes a pivot, and the arm protrudes from the hole formed through the hinge plate of the main body when the shaft is completely inserted into the bearing. Top pivot, characterized in that the projection having a. The method of claim 1, The projections protrude from the decorative plate attached to the hinge plate of the main body, characterized in that the top pivot. The method according to claim 1 or 2, In the state where the main body is attached to the upper part of the door and used, the screw member is provided with a fitting portion for fitting with the tool, and the top side of the door has a work hole for inserting the tool. . Consists of a main body and a base, and attaches the main body to the building side frame opposite the top of the door or the top of the door, attaches the base part to the building side frame or the top of the door opposite, and screws the arm installed in the body. A top pivot comprising a pivot formed by fitting a shaft of a main body to a bearing provided on a base by moving by a member, wherein the top pivot includes a locking mechanism of the screw member. Consists of a main body and a base, and attaches the main body to the building side frame opposite the top of the door or the top of the door, and attaches the base part to the building side frame or the top of the door facing the base and screws the arm installed in the body. The top pivot constitutes a pivot by fitting the shaft of the main body portion to the bearing provided in the base part by rocking by the member. The top pivot includes the locking mechanism of the screw member and the shaft is completely inserted into the bearing. A top pivot, wherein a projection having a length protruding from a hole formed penetrating through a hinge plate of a main body portion is formed when it is inserted. The method of claim 5, wherein The locking mechanism of the screw member is composed of a snap ring fitted to the screw member and a member for preventing rotation of the snap ring. The snap ring rotates integrally with the screw member when the screw member rotates by loosening, and the screw Top pivot characterized in that only the screw member is rotatably fitted with respect to the snap ring when the member is rotated by the tool. The method of claim 5, wherein The locking mechanism of the screw member is provided with a fixing means for prohibiting rocking of the arm, and the screw member connected to the arm is prevented from loosening more than a predetermined amount by the fixing means.