JPS5932525Y2 - Headed bar holder - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a holder for bolts and other headed bars used in bolt tightening devices and the like.

Conventionally, for example, a holder applied to a bolt tightening device is provided with a holder main body having a bolt ejection port at the lower end, and a pair of clamp pieces that can be opened and closed facing the lower surface of the ejection port. The rod body of the bolt is inserted and supported facing the tightening part of the workpiece, and when a socket driven by a nut runner or the like is fitted to the head of the bolt and the bolt is pushed out of the extrusion port, both clamps The clamp piece is opened to allow the bolt head to pass through, and the bolt is screwed into the clamping part, but in this case, the upper part of the clamping part of the workpiece is opened so as not to interfere with the opening operation of both clamp pieces. The space must be wide open on at least both sides, and if the space above the tightening part is open only on one side, bolt tightening can be performed, which is a disadvantage in that the range of application is limited. accompanied by.

The purpose of the present invention is to provide a holder that eliminates such inconveniences, and the holder main body 2 is provided with an extrusion port 1 for bolts or other headed bars a at the lower end.
A pair of clamp pieces 3, 3 that can be opened and closed facing the lower surface are provided, and the rod part of the headed rod a is inserted and supported between the two clamp pieces 3. A clamp holder 4 supporting the two pump pieces 3, 3 so as to be openable and closable is attached to the outer surface of the side so as to be swingable in a direction perpendicular to the opening and closing direction of the clamp holder 4, and A protruding cam protrusion 5 is provided so that when the headed bar a is pushed out, the clamp holder 4 is given an outward swing via the cam protrusion 5. do.

The drawing shows an embodiment in which the holder of the present invention is used in a bolt tightening device, and a socket 6 driven by an upper nut runner (not shown) is inserted into the holder main body 2 so as to be movable up and down. A bolt supply pipe 1 is connected to one side of the tool body 2.

The clamp holder 4 is pivotally supported on the outer surface of one side of the holder main body 2 by a pivot pin 4a at its upper end, and is normally urged inwardly by a spring 4b so that the inner surface of the holder 4 A cam protrusion 5 protruding from the upper part is protruded into the extrusion port 1, and the headed rod is supplied falling from the bolt supply pipe I.
The head of the cam projection 5 is configured to be received by the cam projection 5.

The pair of clamp pieces 3, 3 are supported via a common hinge shaft 3a at the lower part of the inner surface of the holder 4 so as to be openable and closable in a direction perpendicular to the swinging direction of the holder 4. Clamps 3 and 3 are connected to springs 3b, respectively.

3b to the closing side so that the arc-shaped grooves 3c, 3c formed on the abutting surfaces of both clamp pieces 3, 3 align with each other and are positioned below the extrusion port 1, and the bolt When the rod a is dropped and fed, the rod portion thereof is guided by the tapered chamfered portions at the upper ends of the two grooves 3c, and is inserted between the two grooves 3c, 3c.

Next, the operation will be explained using an example of bolt tightening when the tightening part X of the workpiece W exists on the bottom surface of the recessed wall part Y of the workpiece W, and the upper space is open only in one direction. do.

First, when the bolt a is dropped and supplied from the bolt supply pipe 1, the head of the bolt a is received by the cam projection 5, and the rod part is inserted between the two lamp pieces 3 as described above. and its lower end is slightly inserted into the through hole of the tightening portion X, resulting in the state shown in FIGS. 1 and 2.

Next, the socket 6 is lowered, and when it fits into the head of the bolt a and the bolt a is pushed down, the clamp holder 4 swings outward via the cam projection 5 due to the slope of the upper surface of the cam projection 5. As a result, both lamp pieces 3, 3 trace the surface of the rod body of pole a, and are pulled out while opening slightly, resulting in the state shown in FIGS. 3 and 4.

When the bolt a is further pushed down, the head of the bolt a comes into contact with the tips of the clamp pieces 3, 3 that have been pulled out, and the clamp pieces 3, 3 are pulled further outward together with the clamp holder 4. is swung to allow the head and socket 6 to pass through,
The bolts to the tightening portion Become.

To summarize the above operation, both clamp pieces 3, 3 are pulled out to the outside of the recessed wall Y by a small or medium opening movement according to the outer diameter of the rod body of the bolt a, and then the bolt Even if the head of a comes into contact with the two clamp pieces 3, 3, the two clamp pieces 3, 3 escape to the outside, allowing the head to pass through, and eventually the recessed wall portion Y touches the head of a). Both rung pieces 3, 3 that only allow the part to pass through
Even if the width of the bolt is too narrow to allow for opening movement, the bolt can be securely tightened.

In the above embodiment, the head of the bolt a is received by the cam projection 5, and the clamp holder 4 is caused to swing via the cam projection 5 by the pressing force from the head. However, the present invention is not limited to this. For example, a curved large-diameter stepped portion may be formed in the socket 6, and the cam protrusion 5 may be made to cooperate with the stepped portion.

In this way, according to the present invention, a pair of clamp pieces 3, 3
The clamp holder 4, which is swingably provided on the holder body 2, is provided so that it can escape in the direction perpendicular to the opening and closing direction of the clamp holder 4, and the location where the headed bar a should be pushed out is, for example, 3.
Even when it is surrounded from both sides and there is not enough space for the opening of both Knomp pieces 3゜3 to allow the head of the headed bar a to pass through,
If there is a space open in one direction, both clamp pieces 3, 3 can be released in this direction and the headed bar a can be pushed out, which has the effect of widening the range of application.

[Brief explanation of the drawing]

Figure 1 is a cutaway side view of an example of the proposed holding tool, and Figure 2 is a cross-sectional side view of an example of the holder manufactured by the present invention.
Figure 3 is a cutaway side view of the main part showing the state in the middle of extrusion of the headed bar, and Figure 4 is the IV--
FIG. 5 is a cross-sectional view taken along the line IV. FIG. 5 is a cross-sectional side view of the main part showing the finished state of extrusion of the headed bar. FIG. 6 is a cross-sectional view taken along the line VT-Vll in FIG. 1... Extrusion port, 2... Holder body, 3
... Clamp piece, 4 ... Clamp holder, 5 ... Cam protrusion, a ... Headed rod (bolt).

Claims (1)

[Scope of utility model registration request] A holder main body 2 having an extrusion opening 1 for bolts or other headed rods a at its lower end is provided with a pair of clamp pieces 3, 3 that can be opened and closed and facing the lower surface of the extrusion opening 1, and the double lamp piece A clamp holder 4 that supports both clamp pieces 3, 3 on the outer surface of one side of the holder main body 2 so as to be able to open and close freely. is attached so as to be swingable in a direction perpendicular to the opening/closing direction thereof, and a cam protrusion 5 protruding into the extrusion port 1 is provided on the clamp holder 4, so that when the headed bar a is extruded, the cam A holder for a headed bar, characterized in that an outward movement is applied to the clamp holder 4 via a protrusion 5.