JPS59161279A - Striking device for chisel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temporary striking device for efficiently crushing concrete, rock, or pavement.

The so-called concrete breaker, which is often seen at road construction sites, uses a hose to guide the compressed air generated by a compressed air generator to the breaker body, and uses the expansion force of this compressed air to move a piston hammer up and down to strike clouds. was configured to do so. However, with this concrete breaker, there is a lot of energy loss when the compressed air flows into the hose or when it expands within the breaker body and is discharged outside the breaker body, so it is necessary to generate compressed air. The amount of work generated by the breaker body against the refractor key is extremely small, making it extremely inefficient, and requires a compressed air generator and a long hose to guide the compressed air to the reflaker body. Therefore, the entire system was large-scale, and its use was limited to relatively large areas where vehicles carrying the air generator could pass.

In order to eliminate the above-mentioned disadvantages of the conventional so-called concrete braking force, the inventor of the present invention has devised a system that maximizes the amount of work by using an extremely low-output power source that can be applied directly to the main body or placed nearby. He proposed a variety of portable temporary striking devices that could be used for various purposes.
] ).

The present invention relates to a structure in which C) improvements have been added to the structure of the Zero's striking device by further making it more compact, making it easier to use, and making it possible to significantly reduce the weight of the aircraft.

First, the basic structure and problems of the striking device will be explained based on the conventional example shown in FIG. This movable cylinder (2) is fitted with a crank mechanism (3) installed at the top of the main body.
). The crankshaft (4) is either connected to a prime mover (not shown) directly attached to the top of the main body via a speed reduction mechanism, or connected to a separate prime mover (not shown) via a flexible transmission shaft. will be linked to. The movable cylinder (2) generally has a closed upper part and a transparent hole (5) at the lower part, and this internal f
The lower striking rod (7) of the free piston (6), which is tightly fitted in a reciprocally slidable manner, protrudes from the through hole (5) -t! @
(8) 1 starts hitting the top.

On the other hand, the atmosphere (8) is supported at the lower part of the main body so as to have the same axis as the movable cylinder (2) or the free piston (6), or the main body (8) is supported at the top (8a). It is necessary to provide a means to prevent the cylinder from protruding into the outer cylinder (1) more than necessary and from falling downward. If the top reaches too far into the outer cylinder (1), the free piston (6) will hit the zero (8) on its way down (b), and Wvc will not be able to apply a sufficient impact.
In addition, the timing of the reciprocating motion of the free piston (6) relative to the movement of the movable cylinder (2) is disrupted.
This is because the operation of the movable cylinder (2) may stop due to this. In the illustrated striking device 0, the above-mentioned means are provided in the form of a thorn structure.

A small annular chamber [1] defined by the upper projecting ring (9) and the upper surface of the lower holder α opening is provided in the temporary support part at the lower part of the main body.
is provided so that the collar (12) provided at the middle part of the ring (8) can reciprocate a certain distance within this annular chamber OD.

As a result, the flange 02) comes into contact with the protrusion ring (9) K and its upward movement is prevented, causing the W (81) to move more than necessary against the main body.
The top part (8a) is prevented from protruding too far into the outer cylinder (1), and the flange (02) abuts against the upper surface of the Holter cylinder and is prevented from moving downward. Prevents the drawer from falling.

Furthermore, it is necessary to interpose a bullet in the main body to keep the stem (8) elastically biased so as to protrude outward at all times. In the striking device shown in the figure, the partition wall [131] and the protruding ring (
9) The odor inside the room defined by and, the upper end of the room,
That is, a compression coil spring ub+ is interposed between the lower surface (]; 3a) of the partition wall 03) and the large diameter portion [15] that is continuous with the flange 12+ provided at the intermediate portion of the frame (8). This is done so that when the striking device is operated, the tsuba 02 is located in the middle of the stroke within the annular chamber αυ, as shown in FIG. 8, and! This is to prevent the impact reaction force from the object to be crushed, ie, hard rock, from being directly transmitted to the main body when +81 is struck by the free piston (6).

Also, while hitting a hard object, the free piston (
6) is the main body (8) in the T- direction (-) due to the sum of the reaction force that tries to lift the body upward when hitting the body (8) and the elasticity of the compression coil bar, r, (161). Balanced with the weight of the object, the main body and the object rise slightly, and as mentioned above, the tsuba 0 of the certain +8 is located in the middle of the stroke in the annular chamber [11]. But it's true
8) The moment the object is smashed, the above reaction force disappears, and the next moment the main body suddenly collapses due to its weight and the downward reaction force caused by being pulled upwards from the movable cylinder (2) or the crank @ structure f. trying to sink. Separate compression code 4
The louver (161) is also necessary to prevent the collar (12+) from colliding with the protrusion (9) at this time.

The illustrated striking device has the following problems.

The first item] is L T wrapped around the ring (81).
Compression side: Since it is not necessary to insert the spring ab),
In order to obtain a sufficient compression stroke and a sufficient spring force, the overall length must be made quite long, and as a result, the vertical length of the main body becomes quite long.

The second is the space for inserting the % (+ coiled coil spring 06) as described above, that is, the chamber side and the tray (8).
Since the above-mentioned 4 and chambers oII for determining the vertically movable amount of this passenger (81) are provided separately on the upper and lower sides in cooperation with the collar a2 provided in the main body, the vertical length of the main body becomes even longer.

In order to operate the customer's hitting device without any trouble, it is necessary to have a means for determining the amount of vertical movement of each customer as described above, and to always force this device to strike outward. Although this method is essential, it has been impossible to reduce the weight and improve usability by shortening the vertical length of the main body of the conventional striking device as described above.

In particular, considering that in order to obtain high output it is necessary to extend the length of the movable cylinder and increase the amount of vertical movement of the free piston, the conventional structure described above has limitations on the vertical length of the main body. In the basolateral it is impossible to meet that need.

The present invention improves the support structure of the customer in the customer's striking device and the intervening structure of the L-th bullet that applies a downward force to the stem, thereby increasing the support of the target at the lower part of the device main body. The aim is to simply shorten the vertical length, thereby making the entire device lighter and more compact, and also to obtain the possibility of higher output while being more compact. shall be.

In order to achieve the above object, the present invention takes the following technical measures: namely, supporting the upper shaft part of the stem in a vertically slidable manner on the boss part provided at the lower part of the outer cylinder; A compression elastic body is interposed in the space provided on the outer periphery of the post 81s so as to surround this boss part, and the lower end of the If compression elastic body is directly or indirectly connected to the intermediate part of 1y3I through a collar. The holder is fixed to the upper surface of the large diameter part provided in the outer cylinder, and a holder having a stopper is attached to the lower part of the outer cylinder. It was established to extend the .

By doing the above, the following effects can be obtained.

In other words, the compressible elastic body and the host part that supports the atmosphere are not located above and below each other as in the past, but are positioned overlapping in the radial direction of the atmosphere, so the vertical length of this part is In addition to being significantly shortened, for example, if a compression coil spring is used as the compression elastic body, the winding diameter can be increased, making it easy to create a spring with sufficient elasticity and durability. Furthermore, since the upper end of the vertical movement range of the customer is determined by the host section and the lower end is determined by the stopper, as in the past,
a chamber for interposing a compression elastic body (compression coil spring);
There is no need to provide separate upper and lower chambers for accommodating the tsuba and determining its vertical movement range, and this also greatly contributes to shortening the vertical length of the main body.

As described above, according to the present invention, the length of the main body of the stem striking device can be shortened while maintaining its performance.As a result, the entire device becomes compact and easy to use.
It is also possible to reduce costs by reducing weight.
lru. In addition, as the structure of the zero support part has been shortened in the vertical direction, the length of the movable cylinder can be increased accordingly, making it possible to lengthen the movement stroke of the free piston.
This makes it possible to increase the output of the device.

In the afternoon, preferred embodiments of the present invention will be explained with reference to the drawings. fj. Members having the same or similar functions as those of the conventional atmosphere striking device shown in FIG. 3 are designated by the same reference numerals as in FIG. 3.

An outer cylinder (1) is formed inside the cylindrical main body, and a movable cylinder (2) is fitted inside this so as to be able to reciprocate up and down.
A free piston (6) fitted inside the piston constitutes a so-called striking mechanism (A). Strike mechanism (A)
means a reciprocating driving body (B) and this driving body (B)
It is composed of a driven body (0) that is driven through an elastic body such as VC air, and the elastic body such as air that is generated when the driven body (0) moves inertly and moves together. The objective is to obtain the desired impact force by accelerating the driven body using force and thereby striking the target at a much higher speed than the reciprocating speed of the driving body (EJ). In addition to using air as in this embodiment, a coil spring can also be used as the body.In this embodiment, the movable cylinder (2) is used as a driving body (B)' driven via a crank mechanism (8).

The free piston (6) is used as a driven body (OJ).On the contrary, a piston-shaped driving body is connected to the crank mechanism, and a cylindrical driven body (0) is fitted onto this driving body. The air sealed in between can also function as an elastic body〇' A striking rod +71 is installed at the bottom of the free piston (6).
i) It has a projecting structure, and when the free piston (6) moves downward at high speed following the movement of the movable printer (2), this striking rod (7) is inserted into the transparent hole formed in the lower part of the movable cylinder (2). It protrudes downward from the hole (5) and strikes the top of the ring (8).

In this embodiment, a mantle body (])' is provided on the outer gllll of the outer cylinder cylinder (1) to form a double cylinder.
There are ventilation holes (17+ (18) at the top and bottom of the outer cylinder (1)
By providing the movable cylinder (2), the part above the movable cylinder (2) and the part below the movable cylinder (2) in the outer cylinder (1) are communicated with each other.
) reduces the resistance of vertical movement.

The inside of the movable cylinder (2) is divided into a pneumatic chamber (19) above the free piston (6) and a pneumatic pressure chamber (2tj K) above the free piston (6). The air elastic force generated thereby accelerates the movement of the free piston.In this embodiment, a through hole (
21) and communicates the upper air pressure chamber 09) with the outside air when the free piston (6) moves downward. This prevents the vacuum pressure in the upper air chamber from interfering with the acceleration of the free piston when it moves downward. , when the free piston +61 moves upward, the upper air pressure chamber 1
20) and the outside air to prevent the vacuum pressure in the upper air pressure chamber from being used to hinder the upward movement of the free piston (6). The above-mentioned striking mechanism (
The model of A) does not matter. Therefore, the striking mechanism in the present invention includes all striking mechanisms that are included in the concept of the striking mechanism (A) described above.

At the bottom of the outer cylinder (1) there is a boss part (22) of a predetermined length that communicates the inside of the outer cylinder (1) with the outside.
), and this boss part (22) supports the upper shaft part of the bag (8) so that it can slide vertically and reciprocally. W (8) + is supported so as to have the same axis as the movable cylinder (2) and the free piston (6), and its top (8)
The outer cylinder (1) protrudes slightly into the outer cylinder (1).

The outer diameter of the part slightly lower than the upper end of this boss part 22+ is slightly smaller than the diameter of the cylindrical halter (101) extending downward from the lower outer peripheral part of the outer cylinder (1). As a result, a compression coil spring (161), which is a compression elastic body, is fitted into the cylindrical space 9 formed on the outer periphery of the boss portion C22+, and the lower end (16a) of the compression coil spring (16) is The upper step part (, ] 5a) of the large diameter part 05) formed in the middle part of
The downward direction through the K collar is elastically biased.

As shown in FIG. 2, the lower end (6a) of the compression coil (16) may have a reduced winding diameter so that it directly engages with the large diameter portion (15) of the stem (8). In this way, a part of the winding at the upper end of the compression coil spring (16) is moved inwards as shown in FIG. Bend it so that it protrudes, and then fold this protrusion (]
6b) is provided at the upper end of the outer periphery of the host portion (22) and engaged with the engagement groove c261K, the compression coil (16) is inserted into the cylindrical space (2). Stable elasticity can be obtained without chatter.As mentioned before, the outer cylinder (1) has a cylindrical Holter (101 force) extending downward from the bottom of the periphery. The lower end of the hole (8) is made to protrude outside from the through hole 127+ bored at the bottom of the lower end.The diameter of this through hole (27) is
By making the shaft diameter of the bag (8) larger and smaller than the large diameter portion 05), the shaft diameter of the bag (8) is made to function as a stopper (27a) to prevent the bag (8) from coming out.

If it is configured to be installed by screwing into the outer circumference of the lower part, it is better to assemble it on the upper stand.

The present invention is not limited to the embodiments shown in the drawings, and various design changes are possible. and λ can be made of a compression coil spring, or made of rubber or resin into a cylindrical shape. When brought into sliding contact, the air sealed in the annular space (241) functions as a compressible elastic body.

Furthermore, the Holter 00) does not have to be cylindrical as shown in the figure; it may be a member that connects the outer cylinder (1) or the main body and the through hole serving as the stopper. 1) A plurality of wire-like support arms may be extended from the lower part of the support arm, and a ring portion serving as a stopper may be fixed to the lower end of the support arm.

As described above, the tortoise striking device according to the present invention achieves the shortening of the device body, which has been a problem in this field, by extremely simply improving the structure of the tortoise supporting portion. This is a very useful invention.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view (2) showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view showing another embodiment, and FIG. 8 is a longitudinal sectional view showing a conventional example. (1)..., outer cylinder (8)...z (
10)...Holter u5)...Large diameter part (22+...
... Inside the boss part ... (cylindrical) space (25) ...
・Collar (27j...Through hole (27a)...Stopper applicant Yama Co., Ltd. 1) Heavy equipment

Claims (1)

[Claims] (1) The upper shaft part of the cylinder is supported by the host part provided at the lower part of the outer cylinder for underground sliding function, and the space provided on the outer periphery of the boss part [1F - one in which the compressible elastic body is interposed] , the end (of this compression elastic body) is engaged directly or indirectly through a collar with a large diameter part provided in the middle part of the stem, and
A blowing device for blowing an atmosphere, characterized in that a halter having a stopper for regulating the large diameter portion and preventing the stem from coming out is provided so as to extend from the lower part of the outer cylinder.