JPH05169375A - Vibro-isolating handle of hand hummering tool - Google Patents

Abstract

PURPOSE:To provide a hand hammering tool handle that is kept in a simple cylindrical body intact, not enlarged in size, being held down to minimum in weight, and setting is simple enough. CONSTITUTION:In this handle 5 of a hammering tool 1, a grip part 4 is separated from a body part 3 and formed into a cylindrical form, while both these parts 4 and 3 are connected to each other in a state that a vibro-isolating member 6 is interposed so as not to make them contact with each other directly, and this connection is carried out by a joint sleeve 8 extending from a hollow part of the grip part 4 to another hollow part of the body part 3, and this joint sleeve 8 is formed into hollowness and a pressurized fluid fed to the grip part 4 is fed intact to the body 3. With this constitution, a supply of the fluid is maintained without any hindrance and leakage, therefore an impact out of the body part is not transmitted to the frip part at all, and any burden to hands and arms of an operator is largely reduced and, what is more, a diameter of the whole handle is kept in smallness intact to be easily held by the operator, and besides, weight in the handle is not increased as well.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand-held striking tool such as a nailing machine for striking an object such as a nail with a striking member, and more particularly to a vibration-proof function for absorbing a shock generated by the movement of the striking member. And a handle of a hand-held hammering tool.

[0002]

2. Description of the Related Art A hand-held hammering tool such as a nailing machine for hammering a fastener such as a nail onto a target object by a striking member is well known and widely used in construction sites. A typical structure of this tool is a main body part in which a cylinder to which a fluid such as pressurized air is supplied is formed, and a handle formed by being integrally molded with this main body part, and the pressurized fluid is supplied to the end part. It consists of a grip part and a nose provided on the tip side of the main body part, and a fastener such as a nail fed to the nose by a striking member attached to the piston in the cylinder is driven into the target object. ing.

[0003]

In such a hand-held hammering tool such as a nailing machine, a rubber tube is provided on a handle portion gripped by an operator in order to prevent sweat from slipping in the summer and keeping the hand cool in the winter. It was rolled up. Although such a rubber tube fulfills its original function, it is not sufficient for the impact tool to absorb the impact on the worker, and the burden on the arm is large.

Japanese Patent Application Laid-Open No. 1-281881 discloses a power tool such as a grinder having a handle with a vibration-proof structure, which is not the above-mentioned impact tool. In this power tool, a vibration-proof material is provided between the handle and the main body to make the handle have a vibration-proof structure.The connecting portion has a protrusion extending radially outward from the holder extending from the main body. It has a structure in which a vibration-proof material is formed and placed there, and the body holder is covered together with the vibration-proof material at a portion formed with an outer diameter that is about twice the grip portion of the handle. For this reason, the handle portion inevitably becomes large as a whole, and the weight also increases as a tool. Further, the handle portion has to be divided into two in the longitudinal direction because it has a structure that covers the main body holder when it is connected to the main body, and it is necessary to screw the two handle parts to each other after the connection.

Accordingly, an object of the present invention is to provide a handle for a hand-held hammering tool which is a simple tubular body and does not have to be large in size to minimize an increase in weight, and which is easy to connect. Especially.

In order to achieve such an object, according to the present invention, the pressurized fluid supplied from the end of the grip portion is further supplied to a cylinder provided in a body portion which is continuous with the grip portion, and thus the piston is provided. Is a handle of a hand-held hammering tool for moving a fastener to strike a fastener such as a nail, and the grip part is separated from the main body part and formed into a tubular shape, and the main body part and the grip part are not in direct contact with each other. As described above, the vibration isolating members are connected with each other, and the connection is performed by a connecting member extending from the hollow portion of the grip portion to the hollow portion of the main body portion. There is provided a handle of a hand-held hammering tool, characterized in that the pressurized fluid supplied to the main body is supplied to the main body without any trouble.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, a nailing machine 1 as a hand-held hammering tool has a main body 2 and a handle 5 composed of a main body portion 3 extending from the main body 2 and a grip portion 4 which is a portion to be gripped by an operator. As is well known, the nailing machine is provided with a nose extending below the main body 2 and a cap provided above the main body, and a cylinder and a main valve are provided inside thereof, in addition to the illustrated portion. Cage,
When pressurized air as pressurized fluid is supplied from the end of the grip portion 4 and pressurized air is supplied to the cylinder via the main valve of the main body 2, the piston in the cylinder rapidly moves downward. The fasteners such as nails on the nose are hit,
It is driven into a target such as wood.

According to the present invention, in the handle 5 composed of the body portion 3 extending laterally from the body 2 and the grip portion 4, the grip portion 4 is formed in a cylindrical shape separated from the body portion 3. .. The body portion 3 and the grip portion 4 are connected with the vibration isolating member 6 interposed so that the two portions do not come into direct contact with each other. This connection is performed by a hollow joint sleeve 8 as a connecting member extending from the hollow portion of the grip portion 5 or the inside to the hollow portion of the main body portion 3, that is, the inside. Due to this connection, a male screw is formed on one side (left side in FIG. 1) of the joint sleeve 8 and a female screw is formed on the main body portion 3, so that the joint sleeve 8 can be screwed into the main body portion 3 by rotation. On the other hand, a flange 9 is formed at the other end of the joint sleeve 8, and an inner business trip portion 10 that travels inward in the radial direction is formed at the end portion of the grip portion 4 on the main body side. Then, the vibration isolator 6 is attached so as to cover the end surface of the grip portion 4 on the main body portion side and the inward business trip portion 10.

Therefore, when the joint sleeve 8 is rotated and screwed into the main body portion 3, the flange 9 of the joint sleeve 8 gradually begins to push the vibration damping member 6 held by the inward traveling portion 10 of the grip portion 4, By further screwing in, the flange 9 of the joint sleeve 8 becomes
The inward business trip portion 10 of the grip portion 4 is pressed against the end surface of the main body portion 3 with the gap therebetween, and the grip portion 4 is firmly connected to the main body portion 3. In order to allow the joint sleeve 8 to be screwed into the grip portion 3, the end portion of the grip portion 4 can be opened. That is, the lid 12 is screwed onto the end of the grip portion 4, and the lid 12 can be attached and detached by rotation. When the end cover 12 is rotated to be released from the grip portion 4, the end cover 12 is released to open the joint sleeve 8
Can be inserted through the hollow portion of the grip portion 4 to the main body portion 3 and can be connected by rotating the joint sleeve 8 thereafter. The end cover 12 is provided with a pressurized air supply port 13. Also, the flange 10
A steel washer 14 may be provided between the vibration isolator 6 and the vibration isolator 6. The anti-vibration member 6 includes a body portion 3 and a grip portion 4.
Between, the inner business trip section 10 and the joint sleeve 8
The portion between and may be integrally formed, but may be separately formed. The anti-vibration member 6 is made of synthetic rubber or the like having not only anti-vibration function but also sealing function.

When connected as shown in FIG. 1, the impact from the main body portion 3 is hardly transmitted to the grip portion 4 due to the vibration isolating function of the vibration isolating member 6, and the operator's hand and arm are heavily burdened. Will be reduced. Since the connection is performed by the joint sleeve 8 that is inserted through the inside of the main body portion 3 and the grip portion 4, the diameter of the entire handle 5 does not increase, and the diameter of the handle 5 is kept small so that the operator can easily hold it. The weight of the handle 5 hardly increases. Further, due to the connection of the hollow joint sleeve 8, the pressurized fluid such as the pressurized air supplied from the grip portion 4 is sent to the main body portion 3 as it is without any hindrance, which may hinder the operation of the impact tool. Absent. In particular, since the vibration isolator 6 has a sealing function, there is no problem of leakage of the pressurized fluid at the connecting portion.

FIG. 2 shows a second embodiment of the handle of the hand-held impact tool according to the present invention. In this example,
Almost the entire outer peripheral surface of the handle 5 is covered with a cushion member 16 made of the same vibration-proof material as the vibration-proof member 6. The cushion member 16 may be integrally formed with the vibration damping member 6,
It may be formed as a cylindrical cover separately from the vibration isolating member 6. This cushion member 16 not only enhances the vibration isolation effect on the hands and arms of the worker and significantly reduces the burden on the worker, but also prevents sweat from slipping in the summer and in the winter. It also has the effect of keeping your hands cool.

FIG. 3 shows still another embodiment. In this embodiment, in order to make the function of sealing by the vibration isolating member 6 more complete, a member different from the vibration isolating member 6, that is, an O-ring for sealing is shown. Is provided. Specifically, as shown in the drawing, a first O-ring 18 for sealing is provided between the outer peripheral surface of the joint sleeve 8 and the inner peripheral surface of the main body portion 3, and the joint sleeve 8 also has a first O-ring 18 for sealing. A second O-ring 19 for sealing and vibration isolation is provided between the outer peripheral surface and the inner peripheral surface of the inward business trip portion 10 of the grip portion 4. As a result, the function of the seal of the connecting portion is improved, and even the pressurized air having a considerably high pressure can be prevented from leaking.

4 and 5 show an embodiment for preventing relative rotation between the body portion 3 and the grip portion 4 in the connecting portion. FIG. 4 shows an example in which the anti-vibration member 6 between the main body portion 3 and the grip portion 4 is provided with a pin 21 that engages with the end faces of both portions, and in FIG. 5, the main body portion 3 and the grip portion 4 are shown. The boss 2 that engages the end faces of both parts with the anti-vibration member 6 between
2 is integrally molded. These pins 21 or bosses 22 prevent the body portion 3 and the grip portion 4 from rotating relative to each other, which further improves the integrity of the connection.

[0014]

According to the handle of the hand-held striking tool of the present invention, the grip portion, which is separated from the main body portion and is formed into a cylindrical shape, is installed inside the main body portion with a vibration isolating member interposed therebetween. Since the connecting member is connected by the extending connecting member and the connecting member is hollow and the pressurized fluid supplied to the grip portion is directly supplied to the main body portion, the supply of the pressurized fluid is maintained without any obstacle or leakage. Since the impact from the body part is not transmitted to the grip part, the burden on the operator's hands and arms is greatly reduced, and the connection is made by the connecting member inserted inside the body part and the grip part. The overall diameter does not increase, the diameter of the handle is kept small, which is easy for the operator to hold, and the weight of the handle does not increase. Also,
By forming the grip part in a size and shape that is easy for the operator to grip, it has the advantage that it can be universally attached to various impact tools with different specifications. It is not necessary to make many types of molds and the cost can be reduced. Further, the connecting work can be easily performed only by inserting the connecting member into the grip portion and rotating it.

[Brief description of drawings]

FIG. 1 is a partially sectional front view showing a first embodiment of a handle structure of a hand-held impact tool according to the present invention.

FIG. 2 is a partially sectional front view showing a second embodiment of the handle structure of the hand-held impact tool according to the present invention.

FIG. 3 is a cross-sectional view of a main part of a connecting portion, which is a third embodiment of the handle structure according to the present invention.

FIG. 4 is a cross-sectional view of a main portion of a connecting portion, which is a fourth embodiment of the handle structure according to the present invention.

FIG. 5 is a cross-sectional view of a main part of a connecting portion of a handle structure according to a fifth embodiment of the present invention.

[Explanation of symbols]

 1 Nailing machine as a striking tool 2 Tool body 3 Body part 4 Grip part 5 Handle 6 Anti-vibration member 8 Joint sleeve 9 Flange 10 Inner business trip section 12 End cover 13 Pressurized air supply port 14 Washer 16 Cushion member 18, 19 O-ring 21 Pin 22 Boss

Claims (5)

[Claims] 1. A pressurized fluid supplied from an end of the grip portion is further supplied to a cylinder provided in a main body portion connected to the grip portion to move a piston and strike a fastener such as a nail. In the handle of a hand-held hammer tool, the grip part is separated from the main body part and formed into a tubular shape.
The main body portion and the grip portion are connected with the vibration isolating member interposed so that the two portions do not come into direct contact with each other, and this connection is performed by a connecting member extending from the hollow portion of the grip portion to the hollow portion of the main body portion. Further, the connecting member is formed in a hollow shape, and the pressurized fluid supplied to the grip portion is supplied to the main body portion without any trouble, and the handle of the hand-held hammering tool. 2. The handle according to claim 1, wherein a portion of the outer peripheral surface of the grip portion, which is gripped by an operator, is covered with a vibration isolating member. 3. An end portion of the grip portion, to which the pressurized fluid is supplied, is formed as a lid screwed to the tubular portion, and when the end lid is removed, a connecting member is passed through the hollow portion of the grip portion from the main body. It can be inserted all the way, and when the connecting member is rotated, the male screw formed on the connecting member is screwed into the female screw formed on the main body portion, and the flange formed on the connecting member is formed on the grip portion. The inward business trip portion can be screwed into the vibration damping member until it is pressed, and the grip portion is coupled to the main body portion with the vibration damping member interposed therebetween by the coupling member. The handle described in 1. 4. An O-ring for sealing is provided between the outer peripheral surface of the connecting member and the inner peripheral surface of the main body portion, and a seal and vibration isolator is provided between the outer peripheral surface of the connecting member and the inner peripheral surface of the grip portion. The handle according to claim 1, wherein an O-ring is provided. 5. The anti-vibration member between the main body portion and the grip portion in the connecting portion is provided with a pin or a boss that engages with the end faces of both portions so that the main body portion and the grip portion do not rotate relative to each other. The handle according to claim 1, wherein the handle.