JPH0522820U - Clamp bolt device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a clamp bolt device that can be easily tightened by an operator's hand when a jig is assembled to a machine body without using a tool such as a wrench. [Structure] Parallel surface portions 13, 13 are formed at predetermined positions from the tip of a bolt head 11 of a clamp bolt 10, and a bolt insertion groove 21 of a C-shaped washer 20 is engaged with the parallel surface portions 13, 13 so that the C-shaped washer Tightening is possible by turning 20.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a clamp bolt device for attaching a jig and a C-shaped washer to a machine body, for example.

[0002]

[Prior Art]

 Conventionally, with this type of clamp bolt, when the jig is attached to the machine body, the bolt head does not protrude from the jig, so the clamp is designed to be rotationally tightened by the polygonal hole provided in the bolt head. Many bolts are used. And in order to rotate such a clamp bolt, a tool such as a polygon wrench, for example, a hexagon wrench must be used.

[0003]

[Problems to be solved by the device]

 Therefore, every time the jig is replaced, this polygon wrench needs to be taken out of the tool box and the like, and the jig attachment work must be performed, which is very troublesome and prolongs the jig replacement time. The sex will be bad. In addition, when it is necessary to change the type of clamp bolt depending on the jig, it is necessary to prepare a wrench that fits the new clamp bolt in addition to the wrench for the current clamp bolt, which is a very troublesome work. , The field workers were forced to not contribute to productivity.

In view of such a point, it is conceivable to use the "seat glasses that allow the nut to be turned by hand" described in Japanese Utility Model Laid-Open No. 62-151420.

In the technique described in this publication, as shown in FIG. 3, a bolt hole 2 is formed at a position deviated from the center of the washer 1, and the periphery thereof is shaped into a nut shape 3. There is a bottom portion 4 and the washer 1 is provided with a non-slip 5 on the outer circumference.

However, in order to attach the washer 1 and the bolt 6 together with a jig (not shown) to a machine body (not shown), first, the bolt hole 2 of the washer 1 is aligned with the bolt insertion hole of the jig, Next, the bolt 6 is inserted into the bolt hole 2 of the washer 6 and the bolt hole on the jig side and screwed into the screw hole of the machine body.

Therefore, when the bolt hole 2 of the seat is aligned with the bolt insertion hole on the jig side, the bottom portion 4 exists around the bolt hole 2, and as a result, the bolt hole on the jig side is It may be difficult to find it, and it may be time-consuming to adjust the position. Further, when the bolt 6 is inserted, the washer 1 and the jig may be displaced from a predetermined position. Therefore, in order to attach the jig to the machine body, it is necessary to screw the bolts to a certain extent to align them, and then to insert the washer between the bolts and the jig. Since the washer is used, the technique described in the above publication is not considered in this respect.

In view of the above-mentioned problems, the present invention makes it possible to use a C-type washer when assembling the jig to the machine body, and easily by a worker's hand without using a tool such as a wrench. The aim is to provide a clamp bolt device that can be tightened.

[0009]

[Means for Solving the Problems]

 In order to achieve this object, the present invention provides a parallel surface portion at a predetermined position from the tip of the bolt head of the clamp bolt to form a step between the tip outer circumference and the clamp bolt and the fastened portion. It is characterized in that a bolt insertion groove of the C-type washer which is interposed between the member and the member is formed into a step with which the step portion of the clamp bolt is engaged, and the C-type washer can be rotationally tightened.

[0010]

[Action]

 According to the present invention, as in the prior art, the jig is first placed at a predetermined position on the machine body, and the clamp bolt is inserted into the bolt hole of the jig and screwed to a certain extent on the screw portion on the machine body side for positioning. After that, insert the groove of the C-type washer into the bolt screw so that it engages with the parallel part of the bolt, position the C-type washer between the jig and the head of the bolt, and use the C-type washer by hand. By turning it, the clamp bolt can be tightened, a wrench as in the past is not required, and the jig and C-type washer can be easily positioned with respect to the machine body.

[0011]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of a clamp bolt according to an embodiment of the present invention and a C-type washer adapted to the clamp bolt, and FIG. 2 is a jig main body using the clamp bolt and C-type washer of FIG. 2 is a cross-sectional view of the clamp bolt when mounted on the clamp bolt, which is composed of a bolt head 11 and a bolt screw portion 12. On the bolt head 11, parallel surface portions 13 are formed on the bolt screw portion 12 side at a predetermined position from the tip thereof.

Reference numeral 20 denotes a C-type washer, which has a circular basic shape and has a C-shaped shape in which a bolt insertion groove 21 having one end opening is formed in a semi-radial direction. The bolt insertion groove 21 is formed in a stepped manner, and the lower end portion thereof becomes a bolt rotation groove 21a adapted to the parallel surface portions 13 and 13 formed on the bolt head 11 of the clamp bolt 10, and is continuous through the stepped portion 21b. The upper end portion is a groove 21c for inserting a bolt head. Further, a knurled portion 22 is formed on the outer periphery of the C-shaped washer 20.

Next, referring to FIG. 2, the case where the jig 40 is attached to the machine body 30 by the clamp bolt 10 shown in FIG. 1 will be described. First, the bolt of the jig 40 is attached to the bolt screw portion 31 of the machine body 30. The insertion hole 41 is aligned, and the bolt screw portion 12 of the clamp bolt 10 is screwed to the bolt screw portion 31 of the machine body 30 to some extent. At this time, the bolt head 11 can still be screwed by turning it by hand. Next, the bolt insertion groove 21 of the C-shaped washer 20 is inserted so as to be engaged with the parallel surface portions 13 of the clamp bolt 10, and the outer periphery of the C-shaped washer 20 is rotated to rotate the clamp bolt further. The screw 10 progresses to be screwed into the bolt screw portion 31 of the machine body 30, and finally, the step portion 14 formed by the bolt head portion 11 and the polygonal portion 13 comes into contact with the 21b of the C-shaped washer 20, and the machine 10 The jig 40 is sandwiched between the main body 30 and the clamp bolt 10 together with the C-type washer 20. Since the knurled portion 22 is formed on the outer peripheral portion of the C-type washer 20, it becomes easier to rotate the C-type washer 20 by hand.

[0015]

[Effect of the device]

 In the present invention configured as described above, as in the conventional case, first, the jig is placed at a predetermined position of the machine body, and the clamp bolt is inserted into the bolt hole of the jig to a certain extent in the screw part on the machine body side. After screwing and positioning, insert the groove of the C-type washer into the bolt thread so that it engages the parallel surface of the bolt, and turn the C-type washer by hand to tighten the clamp bolt. Also, it does not require a wrench as in the past, and the jig and C-type washer can be easily positioned with respect to the machine body.

As a result, each time the jig is replaced, the polygon wrench need not be carried out from the tool box or the like to carry out the jig attachment work, which is convenient and the jig replacement time can be shortened. It can be shortened and work efficiency can be improved. In addition, even if it is necessary to change the type of clamp bolt depending on the jig, it is not necessary to prepare a wrench that matches the new clamp bolt, and it is extremely easy to change the jig, and the productivity for the site worker is improved. It will greatly contribute to.

[Brief description of drawings]

FIG. 1 is a perspective view of a clamp bolt according to an embodiment of the present invention and a C-type washer adapted to the clamp bolt.

FIG. 2 is a cross-sectional view of a jig mounted on a machine body using the clamp bolt and the C-type washer of FIG.

FIG. 3 is a perspective view of a conventional washer with which a nut can be manually rotated.

[Explanation of symbols]

 10 Clamp Bolt 11 Bolt Head 12 Bolt Screw Part 13 Polygonal Part (Polygonal Part) 20 C-Type Washer 21 Bolt Insertion Groove

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[Procedure amendment]

[Submission date] September 9, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Name of device

[Correction method] Change

[Correction content]

[Title of device ] Clamp bolt device

Claims (1)

[Scope of utility model registration request] 1. A clamp head is provided with a parallel surface portion at a predetermined position from the tip of the head portion of the clamp bolt to form a step portion with the outer periphery of the tip portion, and is interposed between the clamp bolt and a member to be fastened. A clamp bolt device characterized in that a bolt insertion groove of a mold washer is formed with a step to which a step portion of the clamp bolt engages, and the C-type washer can be rotationally tightened.